We use ours on a fairly nice pile carpet with a thick pad and our heavy office chair rolls on it just fine even with my husband sitting there for hours at the computer. it was a great buy!
I was expecting a product that was thicker than the budget product it is replacing. I paid twice as much for this chair mat than the 2 year old one it is replacing. Time will tell. I will save the receipt and see what happens in the next year. If it cracks hopefully Staples will stand behind it.
Although I weigh a very average 215lbs even at 130mil this chairmat still pits from the chair wheels. HOWEVER ... It's still soooo much better than the standard 85mil mats that are more mainstream. This thicker-than-normal mat was definitely worth the extra time that it took for me research and find it. Thanks goes out to Staples who seem to be the only ones to consider the thickness of these chairmats important enough to include in the standard information listed within each-and-everyone of their product pages. I am very pleased with this mat and would certainly recommend it to a friend. Thank you Staples. Dan A. Richmond VA