Mat arrived damaged. I thought it was something on the mat at first and didn't pay attention to it. When I was poutting it in place I noticed that the surface in about four places was melted/smeared. Was too much of a hassel to return and since the damage didn't go all of the way through I just decided to keep it. Hopefully it won't wear out prematurely.
We were worried that since the mat came in a rolled state that it would not flatten properly but all that was unfounded...this mat is perfect for my commercial carpet and all edges lie flat and fixed to the carpet. Very pleased...!