I have been lucky enough to get a copy of the game from a local Blockbuster, being the first person to rent it from the store since I don't have the money to actually purchase the game at this moment. I only had the preorder payment which goes towards the cost of the game at this point because I didn't get it for preorder. To put it simple, this morning I had the chance to look at the CD for the first time and put it into my PS2, read to make some noise.
The very first thing I noticed was how the game loaded since it was a lot different, and how the menus worked and such. As it had already been explained, there is a co-op play mode where people can go as a team and shred down six of the eight venues and make noise, though the co-op doesn't give you the bosses.
Speaking of the bosses, each of these three bosses have their own characteristics in the game in which they play a bit differently, but at the same time, it's going to take everything you have and more to be able to beat them at their own game. First of all, Tom Morello is good enough to kick your self up and down those stairs, not to mention make you shake with every note. However, if you're able to gain the courage to pick up the guitar and hit your insane solos, you will be able to put him away once and for all as you move on with the game.
Slash is where things start to become absolutely wicked as you face him, and there are quite a few difficult songs on the way to even making it to him so by now your hands may be tired. At this point, he is not going to be nice to you and he is here to stop you from where you stand. With his insane ability to strum that guitar, you're going to have to deal with the song he wrote and his ability to run up and down that guitar. The best way to defeat him is to just be confident, for without wanting to beat him and knowing that you can, you won't survive and he will shake you off in a single moment.
The final boss is a major pain in the rear, considering that The Devil, Lou, can throw everything including the Kitchen Sink at you all at once, and there is not a single thing you can do to stop him. He will hit you with left flips, strum bars, and even the double notes that will quickly disrupt your flow. He also taunts you with his quick fingering, and his ability to go from red to green in a mere second, which makes him seem almost impossible. The only way to defeat him is to outplay and outmatch him at every single part of the song, and send him back to hell where he belongs.
The music featured in this game is absolutely amazing as you will hear many originals as well as re-recordings of some famous tracks. The second you go head to head on Raining Blood, or even if you're going to be playing Welcome to the Jungle, you're going to feel the burn throughout your fingers as you try to catch up. Hell, these songs aren't anything to play with considering this game is much harder than the rest of the series.
My Rating: 10/10
Activision, you rule.
The Rock Band's guitar controller is darn near impossible to strum with, since the bar is very flimsy and it always feels like it'll break in your hands if you try to move it too much. On the other hand, the upper fret buttons for solos are very, very useful for tapping. 
