Aside from moaning about the shortcomings the Wii's technical limitations force upon the game, the only thing to complain about with Rock Band 2 – and it’s barely even a complaint - is that it polishes rather than reinvents.
With its large number of modes, weekly DLC that is accessible via the SD Card, online play, better instruments, a variety of modes, diverse soundtrack, and excellently charted songs, Rock Band 2 is the definitive band game for Wii.
Aside from a little less detail in the visuals, this is identical to what Xbox 360 and PlayStation 3 players have been playing since September. It's a more user-friendly experience, simultaneously more challenging for the hardcore and more accessible for casuals.
With Rock Band 2, Harmonix has created a game that's quick to grow and evolve... just like the music libraries of its ardent fans. If there's any game that reflects the age we live in, and the way that we interact with music, it's Rock Band 2.