Works as a chair mat should on a carpet. One can slide around on wheeled desk chairs and easily slide the chair in and out when putting the chair away. My "but" is that it is quite thin and your chair will cause valleys for the wheels to get stuck in. Then you have to heave a bit to move the chair to another spot. It's a minor inconvenience and the divots go away after a while and the mat returns to normal however I'm only 135 pounds and if I leave temporary dents I can only imagine what a 180-200 lb six-footer would experience. While I'm satisfied overall with this and it's not an issue that matters at all if you're sitting still I would buy Staples' thicker version next time. Otherwise quite pleased with this.
I buy one of these from staples every 1 to 1.5 years. They break apart. Supposedly there is a one year mfr warranty. A more expensive 3 year warranty on heavier gauge mat is available; however no one in the store knew anything or had any documentation. It was not in the computer as a clear policy statement. Not up for the glass mat and want to protect the flooring so stuck with a disposable chair mat.
This is a nice sized chair mat for a home office. Clear plastic and durable so far. Does a good job of protecting the carpet and has sharp tips on the down side to keep it in place.