Expeller it to be firmer. Was leaving caster impressions so I put a heavy duty piece of cardboard under it and problem solved. Our carpet/pad is only about 3/4” thick max to.
Fits perfectly with my desk and chair. Firm fit — no sliding.Only problem that I have found in the past is that you need to replace the mat every 2-3 years as it wears out. If the manufacturer can solve that problem using better plastics then you have a real winner.
This is a nice mat and it arrived flat. It's shiny and thus stays looking new longer. It doesn't move around on the carpet when I move my chair. I like it a lot.
Purchased for a chair my 96 year old mother uses on a vinyl floor covering and it has been good so far. It stays in place and is thick enough that the wheels don't bind. Haven't seen any grooves yet either. Does the job.