I work from home part time, and within 2 weeks, I sat down on my office chair and heard a huge cracking noise coming from underneath where the chair mat sits. I’m a fairly small lady at 140 pounds, have a brand new office chair on rollers, and I bought this specifically because it is for high pile carpet.  now every time I sit down, it starts cracking in more areas. Going in the trash :-( 
DO NOT BUY!