Does not work well on medium pile carpet. The supporting studs that penetrate the carpet pile are too short resulting in dips and sagging under the chair wheels.
This is nothing against Staples but the company that mailed this mat to Staples for me needs to learn to use a different kind of tape to wrap the mat up with. After removing the tape all that residue was left on the mat which has made it SO sticky!! I have tried soaking it in Goo Gone alcohol and fingernail polish remover. Nothing has helped much at all. I almost returned it but I desperately needed so I could work from home some what comfortably. Do not recommend ordering if not available in the store!!
I read the reviews on this mat before purchasing and was still concerned that a plastic mat might move. But this one stays securely to the carpet. My prior floor mat was wood flooring with grip on the back and it moved a lot. This one is very secure. One side of the mat was a bit dented when it arrived (as it was not boxed which was a bit dissappointing) but that dent came out after letting the mat sit for a few days before using it. I like being able to see my carpet under the plastic. I am not oversided in weight so I don't know how this floor mat would hold up to a larger person. I would estimate that anyone less than 200 lbs would probably be okay on it.