As with any new service the proof will be in the pudding. Scan and match is a little weird and what about all the pirated music you have downloaded, will that match as well? I don't want to have to actually buy Brittany Spears just so she can hit me one more time. And what about my custom music? I make a lot of tracks and custom stuff, does it back it up or will it fail to sync my music and give me an error? I don't know, I just worry about being a human Centepad.