I have purchased other carpet chair mats in the past that cracked within weeks of using them. A few years ago I tried this mat and it held up better than all of the others. If I can get two or three years out of a carpet chair mat I will be happy. I will continue to buy Staples brand chair mats in the future because they hold up very well and they are reasonably priced.
The mat is completely unsatisfactory. It came tightly rolled in a box. It was very difficult getting unrolled to be able to lay on the floor and even now the edges are still raised and are a tripping hazard. Otherwise it does the job rolling the chair on the carpeting.
Unless your carpet is very thin (or old) this mat is too flimsy to work. The wheels of the desk chair make deep indentations and it becomes impossible to roll across the mat. Unfortunately it will need to be returned.