Order was received quickly & in excellent condition. Extension goes into knee hole plenty far. Mat works quite well enabling me to move my office chair as needed without worrying about tearing up carpet. It also moves MUCH easier!
I have Berber carpet and the wheels on the chair still sink in too much and it makes it hard to move the chair. It leaves indentions in the mat. I guess I need a hard plastic one.
I did not buy the Carpet Chair Mat for my floor. I used it to stop water from getting into my house from the pool area during recent heavy rains. It was excellent for that purpose.