Works as advertised on my (higher) low pile carpet. Very much an improvement. Material is thin so if you sit in one spot divots form in the mat. Not really a problem thus far you just get a bit stuck in a small depression (or 5 of them in my case). This would not be an issue for a more commercial (lower pile) carpet situation. Overall works as intended does not move around on the floor.
When we bought the Staples 36" x 48" Chair Matt for Flat Pile Carpet with lip we knew this was going to be the winner. We have used similar mats but the simply does not do the incredible job this Chair Matt does. It stays on the rug it does not slide away and makes it easy to roll from one side of the desk to the other. We highly recommend this Chair Matt.