The 40 tiles I had ordered there were 20 that are bad. There is a row of black dots on each tile, some I was able to get off and others I could not. Also some tiles have razor cut in them and others have a yellow spot that will not come off.  I did get replacement tiles and some of those have razor cuts too.  Quality control from factory is terrible. I am hoping I can lay them in bathroom in a way where the bad ones I cut the bad part off. Fingers crossed it works out. It is hard to find  a peel and stick tile that has a nice pattern to it.  I hope the tiles hold up too.