I liked to say it works great but the bad part about it is that it keeps moving on the carpet. It should have pointed grippers on it instead of square grippers to keep it in place. It is very irritating to have to keep moving it back in place.
I guess my carpet is Med pile b/c this mat gets dented by my office chair wheels and it keeps on moving towards the right and 'bumping' into my desk and denting. I literally have to move it back twice a day. It might be perfect for a low pile carpet but I wanted to write this so if you're not sure if yours is low it probably isn't and you'll be disappointed with this mat.
I have what I was told os medium pile carpet.I have an office chair purchased at Staples a year or so ago. The mat slips and every few days I push it off yhe mat so I can move the mat back in place and not curling against my desk leg.and then placing this heavy chair back on the mat. I also have depressions on the mat from the casters. the mat shifts I suppose because of movement of the chair.