Chair rolls on it quietly. That's a plus after being in offices where the mat under your chair makes it sound like a freight train when you move around.
This is the second time I bought this mat and I had the same experience both times. It got multiple cracks after just a few months and actually cut my foot in 2 places. I will NOT be buying it a third time!
Not very thick and it slides around on the carpet easily. If someone is standing on it the edges curl up and are a tripping hazard. That being said it allows my chair to move around on the carpet which is what it is supposed to do and what I needed it for.