We have had these a few weeks and are mostly happy with them. I do not like that the backs appear to be an open cell material unlike my previous gelpro mats. I feel like if something oily or pungent spilled and got under them they would be ruined. I also find they move around the floor all the time. I am constantly having to put them back where they belong. It is as though they have minds of their own and start skating across my kitchen during the day.