Bests & Worsts Reviews from Amazon

I don't think it's as durable as the manufacturer claims. I bought this chair mat August 2015, and after 1 year of 8 - 12 hours of daily use, it needs replacing. About 3 months ago it started cracking in 3 locations where the chair wheels spin around when moving the chair. About 6 weeks after the cracks appeared, chunks started coming out in one of the 3 locations. Warranty replacement cost $22 for shipping/handling, plus additional shipping costs if the manufacturer requires the mat to be inspected by them. I haven't decided yet if pursuing a replacement will be worth it. I may just go back to using 7/16" plywood with maybe some peel and stick tiles to cover it. The description states it's for plush pile carpets more than 1/2" think, which mine is, but I don't think the mat is sturdy enough for more than the length of the gripper spikes. Also, just like other's have noted about shifting, mine rotated counter-clockwise and required adjustment about every 3-4 days. The gripper "spikes" need to be longer which might stop or ease shifting.