For a heavy fellow like me (230lbs) it has developed small ruts where the chair wheels usually rest. It requires effort to move out of the rut and effort to keep it from sliding in. Shifting the mat placement has helped but now new ruts are developing. Should have bought a thicker one.
The mat is not firm enough and the wheels of the chair create indentations in the mat which make it difficult to roll the chair while sitting in it. I would not buy this mat again for use on carpet.
This chair mat was sent to us to replace a Staples chair mat that was still under warranty and had begun to fall apart. Thankfully the original chair mat was no longer available because this Vinyl Chair Mat 20236-CC is far superior in quality and design. Should last for years.