It is good for being over carpet but when I sit in my chair it sinks into the plastic leaving prints. I only am 190 lbs. a male. So. It’s not smooth. Those marks stay there. It’s like to memory foam like. Lol
Picked this up at the local store they had plenty rolled up ready to go. It will dent up some if I sit too long in one place (I'm a heavyweight) but next morning it's smoothed out. Chair rolls nicely on it ove the carpet.
Does not work well on medium pile carpet. The supporting studs that penetrate the carpet pile are too short resulting in dips and sagging under the chair wheels.