Great chair mat!  Does exactly what I wanted on a hardwood floor that has beveled edge planking that quickly destroyed any chair leg pads as I scooted the chair around.  Doesn't obscure the beauty of the hardwood flooring.  Only watchout is that the mat is actually 1/8" thick rather than the 0.5" described. It is plenty beefy and durable and probably much better than if it was 1/2" thick and might be a trip hazard.