Where this mat helped my chair glide easier over my carpeting indentations from the office chair wheels occurred within 2 days of receiving. This was very disappointing. I am now rotating the mat to help even out these dips.
I bought this mat to use in front of a home computer on what is apparently a low pile carpet instead of a flat pile carpet which I would call a no pile carpet. It will work for us because we won't be rolling around as in an office; but it is not stiff enough to keep us from denting in the mat with the chair's wheels but still protects the carpet.
This is a good fairly priced chair mat for a person who will not be subjecting it to day in and day out heavy duty use. This particular mat will work best on a low pile carpet. For light occasional duty in a home office it will do the job and preserve the carpeting. I am satisfied with it but having used these protective mats in offices I recommend that if you need a mat that will really stand up to office heavy duty wear and tear and abuse for five days a week go with the thicker more expensive mats.