I bought this to use in my home office however I do not have commercial carpet (the low flat carpet with no plush or nap). I have a low shag and my chair immediately warped the mat. I am only 145 lbs so it's not a tremendous amount of pressure but now I have a roller coaster under my chair. I have to use my legs to try to launch myself up the hill it's created.
I wanted a new mat that would be easy to roll on and specifically chose this one because of it stating Berber carpets which I have. However it's no better than what I had and not worth the extra money. I wanted something hard and using this mat I sink into it after sitting a few minutes. It will probably start cracking or getting holes in it in a several months like the previous one did.