The mat is much too soft. The wheels on my chair make indentions in the mat and I can't roll my chair very easily. It also won't stay put on my carpet....keeps sliding around. I have to readjust every couple days.
measured the carpet pile to pick the correct mat. if I sit in the same spot for a few minutes the wheels cause a dimple in the matt. it takes a push to get the chair to move. the dimples come back to a flat surface but not easy to roll around on.