They don't make these like they used to. I have one from a box store and it's still in use on the same carpet with the same chair that this mat is used with. But the other one has been going for 5 years strong with dents but no cracks. This one is 6 months old and has already cracked
An office chair with five casters moves much better with the vinyl mat on top of the carpet. The price was economical but a more expensive solid mat would work even better.