Using in home office; carpet and pad are about half-inch total; have had less than a week. A valley forms under the chair wheels when I am sitting but chair rolls easily once nudged from the valley. Depressions left by wheels bounce back soon after I get up from chair. Overall I'm quite satisfied with performance.
Did not want to spend the money but the carpet needed the protection as I scoot between 2 computers back and forth. I was hesitant to get one because I also hop up a lot to the printer etc and I did not want the chair to slip out from under me. So far its been just what I needed. I think I move arond enough that the chair dents will be evenly distributed but it is the econony one so it is on the thin side.