When you chair stays in one place for any length of time it creates grooves where the wheels are. So it's just as hard to get out of those groves as it is rolling your chair along the carpet that the mat is on top of.
I bought this product because of the majority of the reviews were great. A few did remark of how the mat gets indentations from the chair rolling on it. Which I am gaving problems with. Also the mat constantly moves. I am not happy with my purchase. Wish I could return it!
Not wanting to damage the carpet pile under my rolling office chair I checked out Staples and found the 36" x 48" clear mat which is a perfect fit and my chair rolls easily on it.