I used about 15 pairs of these foils. I had a problem with defective soft close mechanisms on two slides. I sent a message via Revain late at night and received a reply from decobasic first thing in the morning. They took care of the problem immediately. For the price and great customer service I will continue to buy from them. I read a comment about slide sharing not working. I had a few that required a little extra work, but none of them opened fully. You just have to find a middle ground, for me it was closer to the middle of the release than the end.