I use the mat under my computer chair to protect the wood floor. The top layer of the varnish/shellac on the floor was starting to peel from years of the wheeled chair rolling back and forth over it. The mat is exactly what I was looking for.
As I said - Time will tell. It appears to have a quality no better than those selling for half the price.My previous pad cracked when used over a carpet & pad. It was half the price of this one.