Mat tends to slide a bit and then needs to be re-positioned. The mat is softer than others I have used may be why price is lower chair does not move as easily as the harder ones.
It wasn't what i expected. I have low pile but the mat wasn't firm enough for me to roll on. But Staples took back the mat with no question. Good service.
This is the second one of these mats I have purchased and have been very satisfied with the performance. The previous one lasted several years. No damage to the carpet underneath and it lets my chair move around easily.