It was just what I wanted. I made sure I got the one with the higher prongs so it didn't slide around on the carpeting. That would be my recommendation.
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.