This carpet protector seemed to work for for about 6 months but then developed a tear which turned in a large hole making it useless. I'm going to contact Staples about a no charge replacement under warranty.
My 10 plus year old mat dried out and cracked where my chair sat so I replaced it with a new Flat Pile Carpet Mat. This is exactly the same size as the old one and it is an improvement in that it has has little nubs on the bottom which grip the carpet and keep the mat from sliding around. In another ten + years when this one wears out I will replace it with another like it.
A good serviceable mat for the money. Would have preferred a rectangular mat of the same dimensions without a lip but for the price I can live with it. Only downside is that previously purchased mats of the same kind have tended to crack and break apart after only about six months of use. These do not smell of polypropylene for a time after installation as do some competitors.
The thinner mats I had were fine on a non-pile carpet but they did not work on a pile carpet... they were moving side-ways or forward and backwards when I moved chairs on it.... thus tried this LOW PILE CARPET CHAIR MAT which is thicker but obviously does not work on a pile carpet either. It moves also but not as much. I will not continue buying these mats maybe will find a much thicker and heavier mat which is suited for Pile carpets....