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.
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!