This Carpet Chair Mat has been under our desk chair for a year. The mat moves around on my 1987 medium pile carpet. However it provides carpet protection & allows chair to move around without the mat being depressed--which is good.
I put the mat down and put my office chair on it and have been sitting in the chair and wheeling it around for about 4 days now and so far it's working fine. The mat is softer than some but so far that isn't interfering with my use. For the price I'm very satisfied.
The clear chair mat does the job for my vinyl floor appears to be well made and doesn't slip. Fits well with my desk. Delivered promptly and wasn't curled so I didn't need to flatten it. So far so good.