We all scratched DVDs, and become (stupidly) unreadable. After reading a bunch of unlikely advice on forums ("miror", deodorant etc) and attempted recovery operations with a dedicated software (unsuccessfully) I bought this a bit like the last chance: Although it took me! I could reread 4 DVD unreadable before! Attention must carefully read the instructions and observe the advice. 1 For DVD, I can renew 2 times the operation, and for another 3 times! But the result is there: I look again My starwars epidode 2 when I had given up hope. Long live this product!