Junk! I purchased this chair mat specifically because it was designed for carpets up to 1-inch thick. Absolutely false. My old chair mat that was yellowing and cracking did a better job than this mat. Just the weight of my chair alone causes indentations in the mat. And when I am in the chair the indentations are so bad I amost need to stand up in order to move the chair. And my combined padding and carpet is almost 3/4" so I figured this mat would be more than what I needed. Wrong! This mat is nowhere close to being usable on carpet up to 1" maybe 1/4" and less. If I could return it I would.
Just purchased. It is hard to give a review at this point. Reviews should be given at least a year after purchase to evaluate how the object has held up. My last chair mat cracked in less than a year. Not sure about this one.