I am very happy with my new clear chair mat for my computer. With the grips on the back side of it holds it in place. I like that it is clear so it does not draw attention to it.
This mat was the right item at the right price for my needs. I can easily roll my desk chair to comfortably sit at my desk and move around with very little effort. It blends in with the carpet and I would recommend it's purchase.
I have finally found a desk chair mat that will last more than a year or two. It does not "dimple" very easily from the wheels on the chair. The chair rolls easily on it.