The plastic is soft and my chair wheels don't move smoothly over it. Wheels form dents in the surface quickly making it difficult to roll the chair around.
Excellent mat once I scrubbed it clean and laid it in the sun to uncurl. Expected the curl issue but didn't notice until after putting under the desk and stepping on it that it was very sticky.
Mat itself was everything I could have hoped for My only complaint is that it was delivered in such a state that it actually took 2 days to straighten out enough to use.
I felt that the method by which they were shipped was very poor. They were warped and bent out of shape. It took some time just to get them reasonably flat. Previous shipments where much better