SainSmart (www.sainsmart.com) has a 4.8 out of 5 rating on OK.one, based on 65 user reviews collected here. It is listed under Electronics & Technology and its reputation is excellent. Praise is nearly unanimous, with 96% rating it 4 stars or higher; The business has replied to 50% of negative reviews. Last updated 2026-08-10.
Customer service is top tier - Hassle free replacement of a broken part. Even my original purchase was really smooth and I particularly appreciate how Bettina and the team always followup to make sure things have been delivered/setup correctly. Would purchase again from this company.
Garbage company! shady business practices, terrible customer service. i’ve wasted so much time and way too much much money to deal with these frauds a second more. cutting my losses. save yourself don’t buy anything from this company. buy yourself an altmill or longmill instead you’ll be happier paying little more with a product that actually works.
We apologize for the frustration and inconvenience caused by this experience. After reviewing your case, it appears there may have been some confusion regarding the item ordered, as the most recent order was for the spindle adapter board kit rather than the complete water-cooled spindle kit. To help resolve this, we have offered a full refund for the adapter board directly. In addition, we are assisting with the return of your previous order so that you can purchase the water-cooled spindle kit that you want after the return process is completed. Our support team remains actively engaged with your case and is committed to ensuring a smooth resolution. We appreciate your patience and kind understanding. Best regards,
I ordered the wrong part for my CNC machine and Yolanda at SainSmart quickly solved my problem. She knew what CNC machine I ordered and suggested the correct part. She made the replacement process quick and easy. I was able to get the correct part within a few days. She followed up and made sure everything was correct. She gave great customer service.
I had some issues when I first got the PrintyGo mini 3d printer. Main issue was the app not connecting and also I had a ton of questions as this is my first 3d printer. Their customer service was invaluable. They were super courteous, very knowledgeable and prompt with communication. The representatives working there were amazing. They helped me figure everything out and answered all my questions. Now the printer is working well and so does the app. The printer itself is awesome. My kids and I are really enjoying it.
Great customer service - helpful 24 hour turnaround from both Customer Service and Technical Support regarding a technical issue I was having with my CNC. Sent out a replacement part which I received within a couple of days.
Service was quick, helpful and knowledgeable. They gave me the impression that my satisfaction was their top priority
I bought myself a Genmitsu CNC machine, (PROVerXL 6050 PLus) after my wife had recently died. it was all I could think of doing to save my sanity without her. the machine worked flawlessly out of the box for several weeks when it snapped the spindle during one of the carves. I contacted Sainsmart. they are the people that are customer service for Genmitsu. Sainsmart responded the very same day and asked for a brief film to show the problem. this film was provided and the very next day, a replacement was in the post to me. within three days, my machine was back up and running again. seven month later (last week) the system went down again, only this time if was the control module and once again I contacted Sainsmart with a short film of the problem. once again Sainsmart sent a replacement and once again I am back up and running. everybody knows that things go wrong from time to time and it is all about the quality of customer service that comes with the package. Sainsmart are good people, who for me have been an absolute godsend. I cannot thank them enough.
I was a backer for the Genmitsu Cubiko - a great device that's really helped me get to grips with learning CNC. Whilst installing an add-on for the 20K RPM spindle, I noticed that it was making loud noises uncharacteristic of the 10K RPM spindle that came with the stock machine. I reached out to support, they helped me debug it and when we realised that the component might've been the issue, they were quick to issue a replacement. I've just installed it and indeed, the problem is now resolved. Annie, the customer service rep I corresponded with, was extremely professional and helpful. The entire process was straightforward as a result. I'm happy with my experience!
this is a wonderful and helpful company ever
Sainsmart has an incredible customer service. I have a 4030V2 cnc from them for almost 8 months and am very happy with it. Last week i suddenly could not connect to the control box anymore. After having contacted Sainsmart they asked me to do a few tests and when those did not improve things they concluded that the control box must be faulty and within 3 days of the first contact they decided to send me a new control box under warranty. I call this amazing service and a very possitive experience. I do not hesitate to recommend Sainsmart to everybody !
Five stars for customer service. Their team was responsive and worked quickly to resolve a problem concerning a missing shipment. Professional. Courteous, and ready to help!
I researched many cnc providers and after seeing all the positive reviews in regards to both product and customer service, I purchased my CNC (4040 Pro-Max). It was exactly as expected and has performed excellently. I did have a need to reach out to customer service after about 2 months and the results of that was even better than I had seen from others. A couple of questions to provide answers for and that was followed by an immediate replacement part being mailed the same day. Hope potential customers can respect how rare that kind of commitment to customers is in current times. I would recommend fully and without hesitation, that anyone needing products sold by SainSmart, should purchase from this great company. I know I will continue to lean on them for any future machines and all the peripherals that go along with the products they sell.
Good price. Good Delivery (as opposed to ali-express which is awful) I have the Sunlu Dryer for filaments. It works well.
Service was fast and professional. After root cause was found the problem solving was fast.
The customer service and care exceeded my very high expectations. They continued to reach out to me making sure that I received what I needed and helped with returns.
I initially received a roll of Peba filament with a defect. Aftersales support was awesome as they send me a new roll without hesitation. Great company, lovely people. and the Print came out great :)
Quick and easy process with SainSmart honoring the warranty.
The response time and very cordial ...I always enjoy this company because I know the service will always be excellent.
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