The mat looks and works fine But it is a bit softer than I expected. I only weight 155 lbs and when I sit in my little desk chair on the mat the wheels of the chair indent the mat. That seems like a precursor to having the mat crack at some point in the future. But for now it is working fine.
Needed to put weight on it to straighten out. Also appeared to have pop spilled on it and needed to be washed before using. Mat appears to be ok now and useable. However it was shipped with no covering or protection on it other than a ship to ticket. I think you can do better.
Very nice heavy duty there are spikes but they are not sharp. Arrived rolled. I unrolled placed heavy objects on it overnight it was flat and usable the next morning.