Not worth 50 bucks or even 20 bucks. Poor song choices and not many of them.
1. There's a split between "hairmetal" tracks and New Wave tracks that is unlikely to please anyone buying the game.
2. Some of the tracks are obscure even for fans of the 80's and one track was actually a hit in 1978.
3. Some of the better tracks are from cover bands.
4. This IS truly Guitar Hero 2 barely redressed with a few items. The venues are the same, etc.
Did I mention how poor the track choice is? I suggest checking a FAQ to confirm that you want the songs included in this game because it is only the tracks that are different from Guitar Hero 2. Unfortunately, this game is a pretty blatant cash-in by the game developer. Avoid this game if you can.