I bought this product hoping it will help me open games and movies faster. I use a JFJ disc sander, but JFJ's white polish isn't enough for deep scratches. With Novus, I was able to quickly remove deep scratches in minutes. As for other claims that this product left scratches after polishing, of course that's what it's supposed to do! It leaves a lot of light scratches when you refinish the surface of games, movies, etc., but it also removes deep scratches and smoothes the surface of the disc. If you want a good polish, use the blue JFJ solution and don't use the JFJ Pro Finish Buffing Pads as they will not remove very fine scratches. Use double JFJ pads instead, but you need to cut them in half first. Please note that the disk pictured above is a copy of Maximo for PS2. When I started the disc it had so many deep scratches that I thought it couldn't be repaired. I fixed and polished it in minutes. Overall I recommend this product for grinding optical discs like movies or games, it works incredibly well and has made my job as a games seller 10x easier!