Two weeks after getting the mat it's still curling up on the edges. It was very difficult to get unrolled. I even used a hair dryer to help it along (which did work to some extent). For the most part it's probably going to be OK.
We have gone through a couple of different chair mat types that didn't meet our needs primarily because they didn't properly support the chair wheels leaving very deep indentations in the mat. This mat is significantly thicker and does a better job. There are still light dimples where the chair wheels have been but they seem to relax and reform after a while when the chair is moved. Low plastic odor compared to some others.
Good chair mat for my medium pile carpet. I move a lot between 2 computer systems and this mat makes for smooth chair rolling. Not sure about long term durability but so far so good.