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.
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.
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.