This carpet chair mat is of good quality for the money. It is a lower price point mat so it should be expected to be less substantial than others. It is a little thin and slightly bends over unevenness in the floor surface. Because of this the wheels on the chair will sort of stick between the anchoring cleats of the mat.
The shape of the chair mat fits my desk space perfectly. The little grippers on the underside keep it from sliding on my carpet. My chair rolls smoothly. I’m happy.