Your cart is currently empty.
Richard WuGreat customer service! Had an issue with our dongle and Cad-Ray got it squared away and a new dongle sent right away. - 1/25/2023
Tiffany LeeUpdate to CAD-Ray as this company has morphed into something even better and grander than it was previously. This is the company where you go to when you need a scanner or 3d printer. Their customer service is second to none and their training on sca... read moreUpdate to CAD-Ray as this company has morphed into something even better and grander than it was previously. This is the company where you go to when you need a scanner or 3d printer. Their customer service is second to none and their training on scanners is top level. Don't buy your scanners anywhere else because Cad-Ray is the only company who knows how to solve any of your problems and provides the best technical support. I recently had purchased a software to mill crowns from my medit to my MCXL. No body could get it to work.12 months in and I was resigned to it not working and not being able to mill in house. With Cad-Ray's tremendous hard work, we were able to get the milling unit synchronized to the inlab and inlab synchronized to clinux and clinux meshed to medit. I am now milling scanned crowns for the first time in about 12 months. Yay Cad-Ray, Thank you!!!!! read less - 4/01/2024
Francis ShinAmazing customer service. Wayne Glassoff helped me with purchase decision, taking the time to find out my needs, and then my order was delivered quickly! Easily the best "dental" purchase experience that I have ever had. - 9/07/2022Chase Funk
This has been awesome, to be honest I have know idea how to use it but our team members have picked it up so easy!! - 6/16/2020
Nisarg ParikhAbsolutely a phenomenal company. Everyone you engage with is extremely knowledgeable and helpful.I’m sure they get the same questions day in, day out but they are happy to help you without being condescending. The entire team has been helpful through... read moreAbsolutely a phenomenal company. Everyone you engage with is extremely knowledgeable and helpful.I’m sure they get the same questions day in, day out but they are happy to help you without being condescending. The entire team has been helpful through phone calls, the Cad-Ray FB group, and recorded webinars. Jonathan helped me get a great deal, Laura was awesome on the webinar, Damien is always answering questions on FB, and Armen had a great in-person presentation in Dallas. 100% recommend. read less - 4/22/2022
Office NHFDFrank DeLuca was very helpful even though i didn't buy Medit from Cad ray ! Had an issue and my original dealer was not helpful and i contacted Cad ray thinking it was direct Medit. Frank was extremely nice to log in and do what ever he could until ... read moreFrank DeLuca was very helpful even though i didn't buy Medit from Cad ray ! Had an issue and my original dealer was not helpful and i contacted Cad ray thinking it was direct Medit. Frank was extremely nice to log in and do what ever he could until Medit could take over. would give 7 stars if available. read less - 8/10/2022Jacob Rogers
I love this scanner. Seriously, how can you fit so much quality into the scanner, software and support and such a low price? Magic?!?! Probably. But, for real, we really like using this scanner and it produces great results. Best dental purchas... read moreI love this scanner. Seriously, how can you fit so much quality into the scanner, software and support and such a low price? Magic?!?! Probably. But, for real, we really like using this scanner and it produces great results. Best dental purchase I've ever made! read less - 10/09/2019
Medit i500 Intra-Oral Scanner
Allen MortimerSo glad we used Cad-Ray. They absolutely helped set everything up and even helped us tremendously when we needed a replacement. We are using the i700 and are thrilled with it! - 11/03/2022
Ponciano MeloIf your planning to buy dental oral scanner look for Jon. He will give you a great deal. He is very friendly and knowledgeable about the advantage of Medit I500. AGAIN, Don't forget to look for Jon for your next oral scanner. I highly recommend this ... read moreIf your planning to buy dental oral scanner look for Jon. He will give you a great deal. He is very friendly and knowledgeable about the advantage of Medit I500. AGAIN, Don't forget to look for Jon for your next oral scanner. I highly recommend this guy. read less - 1/09/2021
Jose MoralesService is extremely quick and on point. Highly recommended to join the Cad Ray facebook group! - 6/01/2022Robert Mabry
I don't scan in my practice my assist does. She says it's awesome. Better than the trios or cerecs we have had in the past. The image quality while designing cases is amazing. Haven't seated a restoration from it yet but expect it to be great as well... read moreI don't scan in my practice my assist does. She says it's awesome. Better than the trios or cerecs we have had in the past. The image quality while designing cases is amazing. Haven't seated a restoration from it yet but expect it to be great as well. read less - 6/16/2020Medit i500 Intra-Oral ScannerArchstone Weatherford
Medit i700 intraoral scanner is the first scanner that I actually used on my patients. Before I put my hands on it, I had some prejudices against all scanners. They were bulky, laggy in capturing the images, etc. When I finally had the chance to use ... read moreMedit i700 intraoral scanner is the first scanner that I actually used on my patients. Before I put my hands on it, I had some prejudices against all scanners. They were bulky, laggy in capturing the images, etc. When I finally had the chance to use an intraoral scanner and get introductory training with Laura from CAD-RAY a few weeks ago, I totally changed my view of this product. Very soon, I was able to scan crown, bridge, and even denture cases. Of course, I have had some knowledge about the digital scanner from CEs provided in the past, but being able to apply it in the daily practice in such a short time was beyond my expectations. I would highly recommend MEDIT i700 and training from CAD-RAY.
Big thanks to Laura!
-Lei Fu, D.D.S. read less - 9/12/2021
Medit i700
David WheelerI have had excellent , prompt , customer service and support from the entire team . Especially from Frank DeLuca as I move along the learning curve. His patients and expertise is much appreciated - 1/24/2023
Greg CamfieldCAD-Ray keeps knocking it out of the park. Upgraded from i500 to i700. Transition was seamless! Thanks again guys! - 11/15/2022John Pisacane
I purchased my Medit scanner after the ADA meeting in 2018. I did it primarily on the personal recommendation of Armen Mirzayan, the owner of Cad-Ray. I have known Armen for over 15 years (we both were CEREC trainers) and he has always been unbeli... read moreI purchased my Medit scanner after the ADA meeting in 2018. I did it primarily on the personal recommendation of Armen Mirzayan, the owner of Cad-Ray. I have known Armen for over 15 years (we both were CEREC trainers) and he has always been unbelievably knowledgeable about dental technology and was always moving on the cutting edge.
When you see Armen's daily FB posts, it’s obvious that he is constantly pushing the envelope and exploring the limits of the Medit and the processes we use to idealize our push towards completely digital dentistry. Medit owners are fortunate to have Armen finding glitches and pushing for improvements in our scanner.
As far as after sale service, I can’t find a flaw with Cad-Ray. You won’t find a more supportive and dentist-centered company. Armen and Frank do everything to make purchasers happy and back up their sales.
I’ve heard of horror stories when people shopped elsewhere and only positive comments about Cad-Ray.
In summary, buy your Medit and other high tech equipment from Cad-Ray, you will be totally satisfied.
. read less - 10/08/2019Medit i500 Intra-Oral ScannerEvelyn Chan
Going with CAD-RAY and Laura is one of best investment I've made year 2020 ( I have MEDIT 500). Jumping into scanning is something that intimidated me since I am not a techie person and taking PVS impression is something second nature to me. Laur... read moreGoing with CAD-RAY and Laura is one of best investment I've made year 2020 ( I have MEDIT 500). Jumping into scanning is something that intimidated me since I am not a techie person and taking PVS impression is something second nature to me. Laura made everything a breeze, she is very accomodating and most importantly responds so fast, I never felt left out. Attending the level 1 course of Armen M. was awesome , learned the basics and it was taught in a way so easy to apply. Since my first scan, I never looked back, thinking to myself , I should have done this earlier. The crowns comes back with little to no adjustements which saves a lot of chair time. Cannot get better than this. Big shout out to CAD-RAY, Laura and Armen read less - 10/19/2021Medit i500 Intra-Oral ScannerShant Aharonian
Cad-ray has to be the best company to work with when it comes to digital dentistry solutions. Here are the reasons why:
1. Experience. Everyone in the company has extensive experience in dentistry. They have used all digital platforms and offer cust... read moreCad-ray has to be the best company to work with when it comes to digital dentistry solutions. Here are the reasons why:
1. Experience. Everyone in the company has extensive experience in dentistry. They have used all digital platforms and offer customers first hand experience.
2. Honesty. Based on their experience they share all the good/bad of different systems. They work with you to find a solution that works best for you. Not sell you the piece of the equipment that gives them the biggest commission.
3. Support. Cad-ray offers the missing piece of the dentist/digital manufacturer puzzle. Many other distributors sell you a piece of equipment but don’t have true day-to-day experience with that equipment. Cad-ray’s team openly share their expertise to help customers optimize their workflows with great technology.
4. Passion. The Cad-ray team is extremely passionate about their craft. They truly believe in what they have to offer.
I took Armen Mirzayan’s course on intraoral scanning and it was truly mind blowing. Armen’s insights will help any dentist optimize their craft. I purchased the full sprintray 3d printing ecosystem the help of Frank. I plan to purchase more equipment from cad-ray.
Also, Jesse is a genius in regards to all aspect of digital workflows. I’m truly grateful for this company and everyone who I’ve worked with so far. read less - 10/07/2022
Gould DentistryA newcomer to scanning, I have been impressed with the ease of the process. The commitment shown by each CAD-Ray team member to successful customer training and their skill levelhave been extraordinary. Thank you Kaila, Frank and Andy!! - 5/15/2022Peipei Yu
I purchased a Medit scanner in August and I am very happy with the scanner. I was trained on an Omnicam in dental school and used Omnicam for 4 years in my associateship. The speed and quality of the Medit scanner is comparable to a CEREC scanner but... read moreI purchased a Medit scanner in August and I am very happy with the scanner. I was trained on an Omnicam in dental school and used Omnicam for 4 years in my associateship. The speed and quality of the Medit scanner is comparable to a CEREC scanner but you can’t beat the price of the Medit! I would highly recommend this if you are a beginner or pro in digital dentistry! read less - 9/21/2020
Samuel SchmidtI purchased a SprintRay through them. I'm new to the 3D printer realm and they've been great with answering my questions and getting me set up. I've just really have been impressed with the quick responses, its much appreciated, thank you! - 4/20/2022Amber Thomas
Andy was very patient and informative during our Medit Training. He made sure that we understood exactly what we needed to know in order to be successful during scans. Since our training we've moved full steam ahead in completing scans for lab fabric... read moreAndy was very patient and informative during our Medit Training. He made sure that we understood exactly what we needed to know in order to be successful during scans. Since our training we've moved full steam ahead in completing scans for lab fabrications of crowns, bridges, and Invisalign. Thanks so much!!! read less - 4/05/2022Medit i700Suresh Goel
I have enjoyed using the Medit i500 scanner. Previously I had two 3Shape scanners, however, the yearly fees were adding up and there are no ongoing fees with the Medit. Quality is great, and support has also been solid. Overall very happy with thi... read moreI have enjoyed using the Medit i500 scanner. Previously I had two 3Shape scanners, however, the yearly fees were adding up and there are no ongoing fees with the Medit. Quality is great, and support has also been solid. Overall very happy with this purchase. read less - 2/16/2020Medit i500 Intra-Oral ScannerKurt Adamson
I purchased My first Medit i500 in Sept 2019, fairly easy to set up and learn. I was able to follow the instructions and videos without a problem. I learned tips and trick along the way by following the facebook groups. Anytime help was needed the g... read moreI purchased My first Medit i500 in Sept 2019, fairly easy to set up and learn. I was able to follow the instructions and videos without a problem. I learned tips and trick along the way by following the facebook groups. Anytime help was needed the group at Cad-Ray were quick and sincere finding a solution to problems. I ended up purchasing 2 more i500's in Dec 2019 for my other 2 offices. I didn't think I would enjoy the digital workflow as much as I do. If you on the fence like i was, just do it. get on the facebook groups and post the tips you learn along the way. read less - 1/17/2020
Medit i500 Intra-Oral Scanner for the D.I.Y. Dentist - Get this scanner for $16,000 after our rebate!
Infinite SmilesCan not say enough great things about Cad-Ray. Purchase an intraoral scanner from them and have had to have their support team help out a couple of times. They are top notch! I will be purchasing all of my tech they offer through them - 7/07/2022
Arlington Heights Orthodontics & Pediatric DentistryWe have been using the Medit i700 for about a year now. Frank and his customer service team has made it a smooth transition. He is always quick to reply and is friendly and professional! - 1/26/2023Maggie Sh
I’ve been using Medit 500 since spring of 2021 and really like it. The support system has been very good so far. I just called yesterday and spoke with Frank Deluca, he was very informative and helpful. - 12/07/2021
Laveen SmilesCAD-Ray has the best customer service and support that you will ever receive from any dental company anywhere. I had an issue with a sintering oven I purchased from them. I needed immediate assistance, because I was in the middle of a case. The perso... read moreCAD-Ray has the best customer service and support that you will ever receive from any dental company anywhere. I had an issue with a sintering oven I purchased from them. I needed immediate assistance, because I was in the middle of a case. The person at CAD-RAY who had the knowledge to help me had just gotten into a car accident and was at the ER. Now most companies and people would have said “Sorry, we can’t help right now due to extenuating circumstances.” Not CAD-RAY! That person called me from the ER, in the middle of his personal problems, and gave me the needed information to solve my problem. Exceptional customer service and support is what you will get from CAD-RAY, and it won’t be for a limited time after your purchase. You won’t go wrong with a purchase from CAD-RAY. read less - 1/29/2023Ryan Anardi
Just ordered my i700 yesterday and it ships today. Customer support has been amazing in answering all my questions completely. Looking forward to my delivery day like a kid at Christmas. - 11/03/2021Medit i700
Iseoluwa AdedejiJust got this scanner a few weeks ago. Has changed my workflow. Easy scanner to use. What's truly great is the support behind the product. Whether by call or fb messenger, I have never not been able to reach someone who solved the issue! Very pleas... read moreJust got this scanner a few weeks ago. Has changed my workflow. Easy scanner to use. What's truly great is the support behind the product. Whether by call or fb messenger, I have never not been able to reach someone who solved the issue! Very pleased so far. read less - 6/19/2020
Varghese GeorgeThe customer service has been top notch, every single time. I have only good things to say about them. - 4/05/2022
Blake FerandoI purchased my medit in April of 2019 from Cad-Ray. The support offered is second to none, and the training videos are some of the best out there. Add to that a great support team that is fast to answer questions and issues, its hard to beat Cad-Ray. - 6/19/2020Steven Acker
The i700 provides amazing ease of use and versatility for any digital restorative application. It’s been game changing for our practice. CAD-Ray’s amazing support and Medit’s constant improvement of the software are revolutionary. I’ve been taking di... read moreThe i700 provides amazing ease of use and versatility for any digital restorative application. It’s been game changing for our practice. CAD-Ray’s amazing support and Medit’s constant improvement of the software are revolutionary. I’ve been taking digital impressions for over 15 years with other systems and nothing comes close to the Medit. read less - 8/27/2021Medit i700Benjamin Polan
A while ago I became interested in an intra oral scanner for my office especially for dental sleep medicine and TMJ appliances. I searched online for Medit and found cad ray. Laura from Cad-ray quickly responded and set up a zoom meeting so she could... read moreA while ago I became interested in an intra oral scanner for my office especially for dental sleep medicine and TMJ appliances. I searched online for Medit and found cad ray. Laura from Cad-ray quickly responded and set up a zoom meeting so she could demo the unit. Great job at helping me understand. She set up the financing and I got my unit. A few glitches with my internet speed and getting IT to help with my upload and download speeds and I was ready to go. Every time I had a question I texted Laura and almost like she was waiting for my call she responds. We it turned out my unit wasn't just right so she immediately responded we will replace you unit. Laura has been a joy to work with and the customer service given will only encourage me to do business with cad-ray again.
Benjamin Polan DMD, D,ABDSM read less - 8/27/2021Medit i700
Jared HPurchasing my medit i700 from Cad-Ray was a great decision. I did my first training with Kaila and she was fantastic! Super knowledgeable, patient and truly helpful in making sure I was ready to hit the ground running with patient care. I put a call ... read morePurchasing my medit i700 from Cad-Ray was a great decision. I did my first training with Kaila and she was fantastic! Super knowledgeable, patient and truly helpful in making sure I was ready to hit the ground running with patient care. I put a call into cad-ray support in the middle of a case and sure enough Kaila was also the one to answer and handle the situation. She jumped right on my computer and had things fixed in a matter of a few minutes. Awesome support, great staff and overall super positive experience with Cad-ray thus far! read less - 5/06/2022
Stephanie O'RourkeI am fairly new to scanning with my Medit I700. I am loving this in my business. It has had its challenges at times but the best part is the accessibility and support from Frank DeLuca. He has been instrumental in helping me when I have a patient in... read moreI am fairly new to scanning with my Medit I700. I am loving this in my business. It has had its challenges at times but the best part is the accessibility and support from Frank DeLuca. He has been instrumental in helping me when I have a patient in the chair and need assistance. I couldn't be more grateful for his help. Thanks, Frank! read less - 12/16/2021
Steven HechtmanAs important as the decision of which scanner to buy (I bought the Medit i500 - why is a separate review) is the decision of who to purchase it from. There is a Medit i500 distributor 5 miles from my office who agreed to lower their price to match C... read moreAs important as the decision of which scanner to buy (I bought the Medit i500 - why is a separate review) is the decision of who to purchase it from. There is a Medit i500 distributor 5 miles from my office who agreed to lower their price to match Cad-Ray. So why did I purchase it from Cad-Ray who is 2000 miles away from my office. Because I did my homework. Because the post purchase training and support offered by Cad-Ray was unmatched by any other dealer I spoke with. Their library of online training videos that came with the purchase is without equal. Bottom Line: I’m glad I purchased the Medit i500 and, with hindsight, I know I made the right choice to purchased it from Cad-Ray! read less - 5/12/2020Nancy Hartrick
I am absolutely in love with my MEDIT i700, as is my entire staff. The Medit i700 is reliable, fast, easy to use and the software is incredibly intuitive. I couldn't be happier with the team at CAD-Ray. They are true professionals, and very hands and... read moreI am absolutely in love with my MEDIT i700, as is my entire staff. The Medit i700 is reliable, fast, easy to use and the software is incredibly intuitive. I couldn't be happier with the team at CAD-Ray. They are true professionals, and very hands and responsive in terms of their support and training. Thank you to the entire team. read less - 8/24/2021Medit i700
Eric ReumI bought a i500 almost a year and a half ago. Sadly it ran into an issue with the cord after over a years use. Cad-ray was extremely quick to diagnose the issue and also send a replacement scanner. The quality and ease of scanning has been great! Als... read moreI bought a i500 almost a year and a half ago. Sadly it ran into an issue with the cord after over a years use. Cad-ray was extremely quick to diagnose the issue and also send a replacement scanner. The quality and ease of scanning has been great! Also very happy with the customer service. read less - 6/02/2022
Brandon JonesCad-Ray customer service is great! Super responsive and efficient. - 4/01/2024
Mike HoltWe purchased the Medit i700. With the help of CAD-Ray and their amazing support team the transition to digital scanning was simple. Laura Geney walked us through the purchase and guided us during our training with the help of Andy Nova. Laura has bee... read moreWe purchased the Medit i700. With the help of CAD-Ray and their amazing support team the transition to digital scanning was simple. Laura Geney walked us through the purchase and guided us during our training with the help of Andy Nova. Laura has been there every step of the way checking in weekly answering all of our questions. We highly recommend CAD-Ray and look forward to doing business with them in the future. read less - 7/24/2022
Mathew RosinskyAmazing support. Great product. Thoroughly happy with all that this organization offers and provides to our team. Looking forward to doing more business with them in the future. - 12/13/2021Suresh Goel
CAD-Ray is a great resource for all things digital. Knowledgeable team but also able to anticipate your needs and because they’ve done it so many times they seem to know what you need before you do! Definitely the first place to look for digital ha... read moreCAD-Ray is a great resource for all things digital. Knowledgeable team but also able to anticipate your needs and because they’ve done it so many times they seem to know what you need before you do! Definitely the first place to look for digital hardware and integration! read less - 6/16/2020
Norman KnowlesI have had the original iTero, a Trios 3, and a Carestream CS3600. A staff member broke the lens on the Trios and while waiting 3 weeks for an RMA to send it to Poland for six weeks to get it repaired, Carestream was sniffing around and suggested tha... read moreI have had the original iTero, a Trios 3, and a Carestream CS3600. A staff member broke the lens on the Trios and while waiting 3 weeks for an RMA to send it to Poland for six weeks to get it repaired, Carestream was sniffing around and suggested that I trade in my Trios so I did which began a 4 month nightmare with their piece of junk scanner. Absolutely awful customer service from both 3Shape and Carestream. I needed a scanner and had heard great things about it the Medit i500 at the Florida Academy of Coesmetic Dentistry so I got one. It works really well and Medit keeps adding new and useful features and their architecture is completely open. Two weeks ago, my i500 died so I contacted Cad-Ray surrport and I had a new unit in my office 24 hours later! That's absolutely unheard of in the industry!!! Both Cad-Ray and Medit have positioned themselves to be industry giant killers and they're doing it. The i500 is a phenomenal scanner at a phenomenal price point and service and guidance at Cad-Ray is just plain excellent.If you are thinking about getting a scanner, do it! Just contact Cad-Ray and go for it. You will only be happy about your purchase! Highly recommended! read less - 3/09/2021Armen Mirzayan
Are you happy with the support and training you have received with our team at CAD-Ray.com?
Our business grows much like yours, with referrals and recommendations. We would greatly appreciate a quick review / testimonial
NOTE: ... read moreAre you happy with the support and training you have received with our team at CAD-Ray.com?
Our business grows much like yours, with referrals and recommendations. We would greatly appreciate a quick review / testimonial
NOTE: All testimonials are submitted by verified owners. read less - 5/08/2021Medit i700Mostafa Koperly
I love my medit scanner. I purchase many dental equipments each year and by far it’s the best thing I got for the bucks I spent ( beating my 6 digits equipments ).
We have omnicam and I hated it, multiple crushes, expensive monthly service fee, hor... read moreI love my medit scanner. I purchase many dental equipments each year and by far it’s the best thing I got for the bucks I spent ( beating my 6 digits equipments ).
We have omnicam and I hated it, multiple crushes, expensive monthly service fee, horrible support, etc. I was so frustrated and had to look for an alternative. Many mentioned itero to me and I was about to purchase it and suck another monthly fee until I came by Armen’s video about medit on one of the Facebook group in 2018. I was surprised with the image and the speed and started digging more and contacted Frank to explain the scanner more. Ended purchasing it late 2018 and I’m a happy user Since after. The support is excellent, Frank is there when you need any help plus the Facebook community is there to answer anything. Recently, I attended Armen’s course to learn how to mill from the medit and I got shocked by the AI and the options that the software has. This machine is a beast and you won’t regret it getting it from Armen and Frank. They go beyond and not like other salesman or equipments where you are left behind after they sale you and finish their training. We are in 2020 and I still get the same support as I bought it in 2018. read less - 1/09/2020Medit i500 Intra-Oral Scanner
Ajitha GereddyWe purchased Medit i-500 with CAD ray last December and customer support is great.One of best thing for our practice is having intra oral scanner ,works great . Laura was very patient with our learning curve. - 12/10/2021
Hieu PhamBeen super happy with service from this company. Very responsive, really passionate about their work. - 7/16/2020
All ClearGreat experience with CAD-Ray, specifically Damien, with purchasing and customer service with servicing a scanner that needed replacing under warranty. All around excellent service and I will definitely come back for future technology we'll eventuall... read moreGreat experience with CAD-Ray, specifically Damien, with purchasing and customer service with servicing a scanner that needed replacing under warranty. All around excellent service and I will definitely come back for future technology we'll eventually be adding to our practice. read less - 10/23/2024
Levy DoI'm a repeat customer because Cad-Ray's customer service is fast, efficient, and no nonsense. The classes offered for training for particularly for the Medit is awesome and it comes included which is phenomenal. All the classes that I've gotten to at... read moreI'm a repeat customer because Cad-Ray's customer service is fast, efficient, and no nonsense. The classes offered for training for particularly for the Medit is awesome and it comes included which is phenomenal. All the classes that I've gotten to attend so far has been well organized and I left learning very practical things. Remote support team solves my problem right then and there. Recently I had an issue, and instead of me talking to a sales rep who doesn't know what to do, Kaila remoted in and got it fixed just like that. Thank you and great job guys! read less - 4/19/2022
Bob DJust got my Medit i700 from CAD-Ray and experienced what everyone raves about, the level of customer service by CAD-Ray. As you know you can buy this scanner from a lot of places but they won't offer you help and support. They called my cell and conn... read moreJust got my Medit i700 from CAD-Ray and experienced what everyone raves about, the level of customer service by CAD-Ray. As you know you can buy this scanner from a lot of places but they won't offer you help and support. They called my cell and connected to my laptop and configured everything at 7 PM.. Great great experience. read less - 12/08/2021
Home » Cart