I bought these to stick over top existing real tile. they stick very well to the tile already in my kitchen. The only areas of concern I had are at the corners, and some of the seams. If I am washing dishes a quick press against them and they stick back again no worries, but I also think I only notice them because I know what I am looking for. Over all very happy, total face lift to our kitchen. for under $200. Cant complain. They have been in for over 6 months too. STill no peeling and no lifting.