At first I was very happy. But after a few years I started seeing these notches on the rotors. Over time they deteriorated to the point shown in the photos. The same thing happened to my wife's four rotors. At first I was a fan, but over time I became disillusioned. I will no longer buy from them. Local shops say this is caused by imperfections in the upholstery material. Ironically, this was confirmed by its own employees on the phone. upset.