I have purchased and used several disc repair machines. I am a serious movie collector and have over a thousand DVD's in my collection. And the painfull truth is this machine is poorly constructed and it doesn't leave a mirror smooth finish that is necessary for the newer high resolution DVD machines and Blue Ray players. This machine will suffice if you are only using low resolution DVD players because they are not nearly as sensitive as the newer upconverting machines that are being sold today. This machine will also overheat your discs and will likely do more harm to them than good. If you are a serious movie collector and like the beauty of Blue Ray and High Resolution TV Sets, do your self a favor. Don't waste your money on this machine.....Do some reaserch and be willing to spend a fair chunck of money....good repair machines are not cheap, but they are better than wasting money on a poorly made product such as this.