Wow, def. a rental. Rented it today, already flew through the set list (a little under 4 hours). I have most of the achievements (nearly all of the non-online and non-coop ones.) 5 starred, on expert, nearly the entire set sight reading. A couple songs screwed me up and I got a 4 star, and I only 3 starred the final song.
A couple songs are at least fun to play (the ones near the end that is, the openers are boring as hell). 3 bucks rental = good times. 60-80 dollar purchase? That's harder to swallow. Now to hawk my free bundle that also came in the mail today...