I am very disappointed with this mat. The material it's made of is way too thin and my chair sinks down into small divots when I sit for any length of time making it difficult to move.
I replaced a 35 year old mat that was stiff and brittle and cracked. This new mat is supposedly designed for medium pile carpeting but my chair wheels sink in so bad I have a hard time pushing away from my desk. I'm 5' 11" 180 lbs. I certainly shouldn't be exceeding any weight limits on this mat. If my old mat didn't have cracks and holes I would send this one back.