Unless you're a BIG AC/DC fan, you'll be better off spending you money somewhere else.
I had a blast with this game only because my brother is a fan of AC/DC. If this is not your case, you're probably just gonna get frustrated at the fact AC/DC is such an asymmetrical band. The guitarist, Angus Young, is awesome, and the vocalist, Brian Johnson, has got a quite unique technique, but the rest of the band is just sub par. Playing the drums is not very challenging and the bass lines are monotonous.
If you're like me, a sucker for the RB franchise, but not a big AC/DC fan, I think you should save your money and spend it at the RB2 live game store.