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.
I have vinyl tile floor and this mat works perfectly. It arrived generally flat which was really nice! There was little not no wait on it settling and becoming flat. Pros: - lays flat - large surface - lightly texture on the chair side to keep the chair from just rolling off in to the wind. - strong material. Cons: - it does lightly slide around after a bunch of movement.