Item works great. I did have an issue with a damaged case but the seller provided great service. They are fast to reply and took care of the issue. 5 stars!Despite the size of the suction cups, this seam setter can handle heavy slabs. I attached 1-1/4" thick slabs, with dimensions of 82" x 35" and 60" x 28" with no problem.Suction cups are a bit on the weak side but other than that, it gets the job doneI installed my own kitchen countertop and these seam sealers definitely helped me get the seam very very close to perfect.I’ve tried every option to clean the rings off the countertop I will have to call a professional company to come polish them offWe really love these, we are a commercial cabinet shop and have purchase the much more expensive pneumatic clamps, these one work far better, much more simple, no electrical needed, and you can really align the joint some much better. They only issue we've had so far is one of the suction cups didn't hold attached very long. We sent it back and received a new one with no questions asked. Highly recommend this product were alignment and joint is important.I wish I would of gotten these from the beginning. Compared to other seem setters in the market these are way stronger and much better.