Simply outstanding. No smell and perfectly flat when taken out of box. Mat is rolled up in box but lays flat with no curl when put on floor. Put the smooth side on a hard wood floor and it does not move. Very strong and very thin. Perfect transition from floor to mat on corners because it is so thin. I have had the horrible vinyl for years with the curing and cracking. Will never get any other mat unless it is polycarbonate from now on. Not sure how it would work on carpet but on hard wood or vinyl floor it is perfect. Extremely happy. It does not move at all on hard wood floor with smooth side down. It has a anti skid coating on the smooth side.Plastic came flawless with no cosmetic issues.Overstock also had great price.