I had this floor mat on the carpeted floor of my home office for less than an hour when my desk chair (on wheels) had already pressed deep indentations into the mat. Even if my carpet pad is a little plush my carpet is not deep pile so this mat should not be indented. I guess it is not made of durable heavy duty plastic and does not have the strength to "hold up" a 140 lb person and their desk chair.
It required three men and a small boy to lay it flat. Within days this chair mat developed "dimples" where the chair wheels were located. I tried to go cheap and should have bought the more expensive rigid model.
We use on floor to cover carpet to make it easier to roll a wheelchair around all day. They hold up very good. We now have 6 in the room so they can mobilize better.
This was a replacement for a cheaper mat so we do not know how well it will hold up under a years use. The limited lifetime warranty was the controlling factor in our purchase.
It would be nice if Quill would not put a huge sticker directly on the mat that is impossible to remove. Also should be delivered in a box or at the very least wrapped in cardboard. Not just a mat and big fat un-removable sticker!