Another big addition would be the keyboard (or keytar if you prefer)

The keyboard is a nice addition (if you don't mind adding another plastic instrument to your living room), but not all of the songs have keyboard parts and not all of the keyboard parts are much fun

The extra track selections and the cymbal upgrade for the drums make great additions to the experience.

The keyboard is a welcome addition and the training feature is enjoyable

This is just a neat addition that makes the game a little more fun and personal

The filtering of music is a welcome addition to the game (being able to set songs you don't want to play, to not show up)

The new Keyboard and Pro Drums support are really nice additions.

This addition of a fifth instrument is a great

Wish they were skippable*if you are a fan of only one instrument, it takes a while to unlock all the road challenges and you still have to play songs you don't like to get your artist/band through the single player gameAll in all, a great addition to the series and well worth the purchase for RB fans or just music fans looking for a fun game.

My son and his friends would watch us, hysterical as we pounded out bass on a Boston tune

The guitar + bass + keyboard combination appears to be the kiss of death; it WILL NOT WORK as of 10 / 30 / 2010.