I am not happy with the chair mat. It is supposed to be for high pile carpet but the chair sinks into the mat and leaves indentations. I am probably going to return the mat.
Still doesn't seem thick enough for the pile of my carpet. Just the weight of the chair makes some dent. Don't know that I could do any better without spending an bunde or buying 2 to put on top of the other Came flat...a plus. I liked that the back wasn't as sharp as the ones I've gotten in the past. Made it easier to handle when carrying it to the office.