This carpet mat is too soft in comparison to the next level up. We have the next level up as well and the plastic is much more durable / firmer and does not allow the chair to dig into the mat like this one does. This mat would be good for industrial carpets which don't have much movement since this mat is too soft not firm enough.
This mat replaced a previous one I had had for over 10 years. It is thick enough yet flexible enough to allow my chair to move around smoothly. Though I think because my carpet is a little too thick my chair does sink in after I’ve been working for hours and I have to force it out of the dips in the mat. However it serves its purpose and was exactly what I wanted.