This is my second project involving Smart Tiles and I am absolutely hooked on these! Easy to cut, easy to peel and stick, and, very important, easy to peel off and re-position if needed. I applied the Maronne Smart Tiles on top of the old ceramic tiles in the powder room and so far, so good. Just make sure the ceramic tiles are squeaky clean before applying the Smart Tiles. (t.s.p. works like a charm) I highly recommend Smart Tiles for quick, no-mess, no-stress updates to your powder room or kitchen.