I have very plush carpet in my home office. I bought a cheap PVC mat at an office supply store only to find it was garbage. I'm a big guy and found the wheels getting stuck in the indentations. I researched the best material for the mat and found polycarbonate to be the strongest. I didn't want to break the bank and didn't feel like paying $200 or more for the size and quality. This one fit my budget and is very sturdy. It does move a little, but as long as you have furniture against it to stop it you're fine. Watch unpacking the mat; once you cut the band on it, it unfolds with great force. I bloodied my knuckle in fact.