Holds on to the carpet and does not slip. Chair rolls effortlessly and looks good in my home office. Only problem was that the mat was delivered coated in sooty dust. I had to scrub before I would place on new light color carpet.
Good size good thickness mid-range price. It's still new (maybe two weeks) but so far it's great - I forget it's there which is a good thing for a mat. It doesn't move around the room but stays right where it belongs. Deep enough to scoot around a lot.