Of course, you still have to lug gigantic turntables to each gig. For those DJs who refuse to give up their vinyl turntables because nothing else "feels right", it's great. But for those who are looking to make their road gear smaller, it doesn't help. A purely digital MP3-based system could have a lot of advantages over a system like that, if only you could convince a the DJ that the vinyl turntables weren't necessary.