This mat is working well so far. It gripped effectively on a shallow carpet. Had to let it sit out for a little while at home for it to uncurl. It's small so only good if you don't move widely.
This chair mat has worked well so far; I installed it just a week ago. The last one I had began cracking after about two year's use so I may feel difference about my rating unless this one last longer!
The mat is too soft flexible and the wheels of my office chair just get 'stuck' in the indentation it leaves. It won't move. The mat is just not hard enough