For me it was the tracklist that won me over for the game, and the tracklist is very very good, a good mix of Queen with Daft Punk with Tiesto and Benny Bennassi, all very good mixes.
The game itself is well done, good graphics, when you admire them! and there is no story just a number of setlists that you have to run through although they are very good!
Online is good but as with Guitar Hero, as usual expect the crazy-ass people who are amazing at the game and 100% easily, other than thats its still a good fun game that will have many talking points afterwards.
In conclusion at this price you have a very good deal and the game will last a while as it is a good party game, although it cant have 4 players like GH it is a very good co-op game....if you have someone else with the game. Hope this helps!!
Thanks!!