My old mat retired the impressions of the coasters for many hours. The physical size of the new mat was much larger than the replaced mat so maneuvering the chair was not limited.
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.
I like the size but it's seemed to be softer I can see my roller indentations and I don't weigh much. I just hope it last my last one bought at Staples lasted me a long time until it cracked. When I roll my chair it seems to be a little harder due to the softer product it's made of.