This is a very poor chair mat. I have a flat pile carpet but the mat is too thin and my chair wheels are already making huge dents. It also moves around...I need to buy a new one already and this one is only a month old!
The mat is ok for what I paid. I think a mat made of a hard material would have been better and I would have been willing to pay the extra expense if I had found one.
This new product is a little thin and leaves imprints from the desk chair. Don't remember the old one doing that. Will have to get a thicker one next time.