This mat allows me to roll my office chair on top of my new cut pile carpet. It does tend to get "dimples" where the wheels sit for awhile but I can still roll around. Good price for what I got.
What can you say about a may? It's good medium heavy height. It's flexible enough to get in to place. But still sturdy enough for 260 lbs of me plus chair. If it lasts 5-years like my last one I'll be very happy.