They do what they are meant to do- protect the porcelain floor. They stick well, just make sure to give it a minute after putting them on before moving to around.

At least the adhesive backing is worthless on smooth surfaces. Black felt from this outfit sheds a lot of tiny black fibers.

The adhesives are still intact after a month. A little more adhesive would be better, but we'll see if they stay put. Can be used on multiple items.

Just put them on my bed legs, kitchen chairs and trampoline exerciser. Makes the scratchy noise disappear. Gentle on our newly refinished hardwood floors.