The first chair pad/mat was not thick enough nor did it have deep enough teeth for my carpet. I was able to return it for a full refund and the store ordered the better one which was delivered to my home. It is perfect! My desk chair rolls around on it just fine and it does not move on the carpet. Great product!
The mat I replaced was 3 mm thick and lasted 25 years. This one unexpectedly came in quite a bit thinner. I don't think it's durable enough for sitting at the computer on a rolling office chair. It is already showing signs of wear.
Great product but the Staples associate taped it into a roll for easy carry. Good idea but it left tape sticky all over the top surface of the mat. I got it off but took the gloss off the mat - no big deal but next time roll it up with the underside out!