The mat does not work as expected and I do not weight more than 190 lbs. The carpet was measured before I purchased and my chair sinks into the mat. Not happy.
I had the same mat for high pile carpet before and that one is much stiffer you can't possibly roll it. This one came rolled so it is softer which tends to create dips. Worst part though was the packaging tape it was secured with had totally melted on to the mat it took me an hour of goo-be-gone to remove all the residue.
The chair casters still leave a dent in surface. If you move it they “heal” but not sure of long term life. Also doesn’t appear to have longer “ spikes” for thicker carpets.