I have this over flat pile carpet in my home office and it almost makes things more difficult. It sinks in where the wheels have been stationary for a while and thus makes sliding around in the chair over the mat harder. It had one job man. smh.
This isn’t that old I use it five days a week throughout the day on a carpet. I have a chair with wheels. This is cracked in two places where the wheels were. It didn’t seem cheap or hard like it would crack easily but it did.