I have a home office with thick carpet. I bought this because other pads would not hold up with the thick carpet. This pad is not stiff enough to work with thick carpet. The wheels of my chair create depressions in the pad and then the chair does not want to roll to other locations when I need to move. I would recommend that you keep looking for a sturdier pad.
This mat is much too soft for a medium pile carpet. The chair rollers sink down into the mat and do not want to move. Do not pay this amount of money for this mat. It is just as bad as our old mats that were soft and broke into pieces.
I was a bit surprised that as you sit in one spot the plastic or whatever the carpet is made from has a tendency to form a dent and does not allow moving around in the chair. I thought it would be more rigid and not become dented. However during the night it goes back to the smooth surface and is OK for a hour or two then becomes dented again and holds you in one spot.