I love the idea of the chair mat. However the mat itself is very soft so the chair rollers sink into the mat and it’s tough to roll on the mat. The mat also shifts and doesn’t stay put on the carpet. It’s possible the carpet pile is a tad high.
I love this floor mat. It came quickly. It was loosely rolled rather than flat but opened up immediately. Perfect size for my "L" shaped desk and easy to roll on.