Went to purchase chair mat in store. This was only model they had. Too thin. After only a few hours rollers on chair created permanent divots in mat. total waste of time and money.
It is just okay I can move my chair back and forth easier but I wish they would make one that is a little stiffer so that my chair rollers would not make sinks enough that it I hard to move the chair while sitting in it. If I were much heavier I could see that it might ;sink' in but I weigh 137 lbs and I would like to have one that would stay flat.....or at least flatter!!
The mat looks and works fine But it is a bit softer than I expected. I only weight 155 lbs and when I sit in my little desk chair on the mat the wheels of the chair indent the mat. That seems like a precursor to having the mat crack at some point in the future. But for now it is working fine.