I'm disappointed with how the chair sinks into the plastic. I specifically bought this as it was rated for plush (high pile) carpet. The plastic is flimsy and not as thick as described. As a result there are permanent grooves in the chair mat which makes rolling the chair difficult.
This mat is just fine It takes a lot of "chair rolling" walking on and stacking things on and is holding up well. I doubt I will need to purchase another in the near future but when I do hope to have the same mat. Possibly a pricier mat is even better but why spend more to find out?