Coming from a person who owns Rock Band, Rock Band 2, Beatles Rock Band, Lego Rock Band, Green Day Rock Band, and Rock Band 3, I would say Green Day Rock Band is a very solid, highly entertaining effort by Harmonix at another band-specific release. If you appreciate the music of Green Day, this game is a no-brainer. If you enjoy music games in general, you will have a lot of fun with this game. All told, a great set list. The first time I played through it I noticed more than a few songs where I was like, "This a Green Day song? I never knew that, I love this song!" Green Day Rock Band allows guitar, bass, drums, vocals, including solo vocals, like all other Rock Band games, and an additional option of harmonies. For the harmonies option, you can use the microphones provided with the Lips game, if you already have them. Comparing apples to apples, Harmonix made some much needed improvements with their Green Day release over their Beatles release. Both band-specific games have a solid set list but the achievements for Green Day are much more attainable than in Beatles. By playing fairly well, expect to earn between 600 and 700 gamerscore points somewhat easily. Unlike Beatles Rockband, you are not required to 100% most of the songs on expert difficulty to earn some achievements. In my mind, the relative attainability of the achievements only serves to increase the fun factor of this game, where it can played for pleasure with your friends without the pressure of perfection. One last note, I would encourage you to buy this game new from Amazon.com so the code on the back of the instruction manual will be intact, allowing you to import your Green Day songs into Rock Band 3.