Okay I sell alot of used cds & dvds so I have tried alot of products that claim to repair scratches. Some work pretty good like Aleratec's machine. But this stuff is not only crap but it will ruin your DVD player! Seriously! I tried it on a DVD and then went to play it. The disc would not read (mind you this was a pretty new player) So I tried another player same story. Well that's okay like I said I have tried alot of these so-called repair products so I wasn't really surprised when it didn't work. The real surprise came after when I tried to play another disc and my player couldn't read it. So I tried a brand new disc, same story! Then I tried to use the other player I have. Same story again! This crap ruined 4 discs and 2 players and good luck getting any help from the con artist selling this crap! I just can't waste another minute writing about this junk. So let me sum it up in 3 words: DO NOT BUY!