The chair mat seems fine.  The packaging on this item was terrible!  Ordered 2 of the mats and both arrived with box (if you can call it that) opened on both ends.  It was basically a piece of cardboard wrapped around it and secured on the ends with one piece of tape.  One mat was ok, the other was broken.  Wayfair was great about replacing the item and a new one arrived within a week.  That also arrived the same way, but was not broken.  The item is obviously too heavy for such minimal packaging.