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!
I bought this as a gift for my husband who is not a heavy person - maybe 185. The mat has dents in it from when he sits in his chair ... at the space where the rollers are. The dents don't come back up and it makes it extremely difficult to roll back and forth. I would never recommend this particular product.