Well it has a good multiplayer, but the single player is......

User Rating: 8 | Rock Band WII
This game has a great multiplayer mode.
up to four players, this gam ewill make you rock and roll for hours and hours with your friends. great instruments like the bass, the microphone, of course the guitar, and the drum makes the gamelay even more revolutionary.

The bad part is, the singleplayer mode.
This game is boring to play alone, since this game was created for multiplayer.
online is pretty much useless, and yea, you can just sinply go to the cheats mode section, and just unlock all the songs in a single second. ( by pressing the control buttons somehow check the interent for cheats).

The bottom line for this game is, that you shouldnt play alone.

it will be better listining to your ipod than playing this game alone.
but if your like a tripleit or a twin, its worth to play with them.

But still, overall that this game isnt a worthy game for a singleplayer game.
If you have no friends, dont buy it.
it would kinda be useless