the price was very reasonable and it is being used on the carpet in my computer room. Actually this is the second chair mat we have purchased; one for under my computer and one under my husbands desk. Would recommend it to anyone.
The Mat eventually gives way to indents and becomes difficult to move around on with a chair. The indents cause edges to poke upwards and become a nuicance.
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.