The two things that has me wanting this over an amp that can take a line in is.
1) I have a small kid who like to sleep and doesn't like me jamming out, though god knows I've tried to break her.
2) it would be kind of nice to just need one cable, and not have to plug into to anything else if I just want to mess around with backing tracks or something else
ok number 3
I like the ability to record on it also so I can listen to a playback, and see how bad I suck