Will you be my Band Brother?
First, the bad stuff. The only one I noticed is that you can't save your scores. That's the only bad thing with the expansion cartridge, but boy is it a bad one; I mean, really bad. It would be awesome if we could save our scores to try to improve them in the future, but no, Nintendo didn't put that function in. My guess is that they didn't put it in so more songs could fit [There's 31 songs!] but I might be wrong. Oh well...
But the songs that are here are all awesome. From J-pop to game music such as Ashley's theme from WarioWare Touched! and Yoshi Touch & Go, the song variety is good. Also, a big difference compared to the songs in the original Band Brothers is this; the songs in this cartridge are WAY harder.
The graphics don't matter in this game, but they could've been better anyways. The sound is awesome though, and replay value is quite high.
So basically, the only thing that would make you buy this expansion is if you loved the original Band Brothers. And the only thing that will make you come back to play it is if you love the songs themselves, because, unfortunately, you cannot store scores.