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.
THIS PRODUCT IS NOT STIFF ENOUGH TO REALLY PROTECT MY CARPET.. I HAD TO PUT METAL SUPPORTS BETWEEN IT AND THE CARPET TO ACHIEVE THE PROTECTION I WANTED