Despite some of the reviews, the mat didn't take long to flatten (one day of use was sufficient). Good grip into the carpet and easy to slide on top in an office chair. Office chair does still create some divets in the mat and slightly in the carpet (medium pile) but they tend to roll out after a while. I think these mats are definitely designed to reduce carpet wear/damage as opposed to stopping it completely, which I'm confident this one will do. Happy with this purchase