It looks good and grips well on my very low pile carpet. Of course I've only been using it for a week -- companies always ask for ratings very quickly -- so there's no way to predict how good it will be over time.
Nice thick chair mat for use on carpets. Cheaper thin mats seem like a good deal but will crack after a few months. Previous thick mats I've had last for years. This mat is even thicker (and more expensive) than my previous chair mat.