Not as solid as they use to be. It tends to pit after sitting on chair for a bit of time. Makes legs not move easily. That is what it was bought for to make chair with wheels move easily.
The mat’s the perfect size (for my office at least) and enables me to roll about freely while protecting the carpet. I don’t know what else anyone would expect the mat to do. How well it stands the test of time only time will tell but my initial impression is I have no issues and I’m pleased with my purchase.