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.
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.
Received but is Not what I needed. I needed a much thicker mat to take the weight of both my weight & the Chair. The one I received curls up causing me to trip and fall and leave dents of the wheels. The type I need is as thick as the same in heavy vinyl or glass types. Please let me know the proper type. I still was able to find an area to used this one