My previous chair mat lasted for 10 years without a problem. Then age began to take its toll and for 2 more years of ownership I put up with brittle plastic so that the old one had several holes in it. I'm happy to have a new version; it works perfectly on my low-pile carpet.
the mat is not heavy enough. Doesn't grip carpet enough to keep it from moving. If the vinal were twice as thick and had a better grip underneath it would probably be OK>
I ordered the mat in-store and it was shipped to my house. It was a perfect fit for the desk and chair. The mat laid down smoothly and is very serviceable.