This is the second one I bought and I bought it because it claimed it would not creep - but it can creep 4 or 5 inches a day and has to be moved frequently. All of them at Staples seem to use the same thing to hold them in place and they don't work. The old ones did.
i think this would be better used on a wood or tiled floor. i have it on a carpet and it is too soft for the chair to roll smoothly. it's not the mat itself i just chose the wrong kind. i really need something stiffer.