This chair mat is good quality is a good size and and generally works well but on my carpet (medium pile - nothing unusual) the mat tends to deform under the weight of the wheels. This leaves indentations that keep the chair from rolling smoothly. I would prefer a more-rigid mat.
The carpet chair mat is too thin and flimsy. I have a small-size office chair on rollers and the rollers have already made deep dents in the carpet chair mat. I had the old one for more than 20 years without this problem. I would gladly have paid more for a mat that works.
This mat was exactly what I was looking for to smooth my "ride" now that I'm working from home and have to get up and down from my chair many many times a day. Much easier on my back and it's barely visible. My only caveat is that it came rolled up (understandably) and after I removed the heavy-duty scotch tape holding it in a roll I have not been able to get rid of the tape's stickiness which sticks to my shoe every time I walk over it. I've tried a sponge with boiling water and many attempts with Goo-Gone to no avail!