After playing GD:RB for a couple of hours tonight I have to say that I am impressed with the title as a whole.   After reading the review on GB about it, I was a bit unsure if I was going to be a fan of the game as I am not a die-hard fan of Green Day.  Let's just say that I have had a passing relationship with the band, and that is nothing to do with the quality of the songs that they have produced, just the fact that I have been out of the loop of much of music in the past 7 years or so.  Sure, I loved Dookie as a teenager, but that is about the only album that I really have of theirs. 
 
All I can say is that Harmonix really takes care in making all of their games.  I am a die-hard fan of Rock Band, and have put in hundreds of hours on guitar and drums - I have purchased the ION kit, so you know I am a fan of the series - and have dropped hundreds of dollars on DLC.  They really did not disappoint here, and I have to say that the interface that they made in RB:B was perfect for this type of game, and that has translated very well here.  I am hoping that they do some type of variation of this on RB3, as this is one of the games that I am always saying "just one more challenge or achievement" because it is so easy to see how close you are to all of them.  For me, this adds quite a bit of replay value even after completing the game once through, which is more than I can say for much of the Guitar Hero series before GH5. 
 
The song selection is perfect, and really manages to encompass the vast majority of their career, and I have to admit that I forgot about how much I loved so many of the songs.  It has just been a long time since I have listened to a lot of them, and it really managed to bring back a lot of memories.  I really wish that some of the perennial 70's bands would do something like this.  I would really love to play a Pink Floyd version of this game, but it really seems like the band specific games are going to become less and less as the music genre is shrinking quite a bit after last year's onslaught of Hero titles.  Harmonix just oozes attention to detail, and the polish on their games that they make are stellar.  This really makes me hopeful for RB3, and I look forward to playing a lot more of this game in the coming months.