This mat works reasonably well but it should only be used for light/occasional duty as it quickly develops indentations where my desk chair sits. I've been able to compensate by shifting chair positions and it's at my desk in a vacation home so not a big deal for me. However I would NOT recommend for daily use.
Thick yet flexible. i expect it will last 3 years on carpet before it cracks; same as the last one. I suspect it will last much longer if used over a hard flat surface such as a vinyl or wood floor.
Try'd cheaper mat first. Measure carpet as instructed and should have worked. Couldn't tell any difference from directly on carpet. Went back and bought best they had. Chair still leaves indents and hard to move when set in one spot. Was expecting to be more rigid.
Let me lead off by saying this is not a commercial grade mat but is perfect for the home setting where it will not be subjected to continuous use. It is a good quality product and is good for bear or carpeted floors.