Graphics: 4.5/5 The backgrounds and dreamscapes and the overall look of the band is really great. The dreamscapes are really vivid and colorful, and the members look a lot like themselves. My only real problem with any of this is when you use "Beatlemania", and the 'highway' turns yellow... it can make it difficult to play drums.
Sound: 4.5/5 TB:RB has a solid soundtrack, no doubt, with songs that are great to play, including "Back in the USSR", "Day Tripper", "Helter Skelter", "Sgt. Pepper's Lonely Heart Club Band", and many more. However, I can't help but notice there are a number of songs that seem to be sort of random inclusions, while great songs like "Eleanor Rigby" and "Hey Jude" are left off disc, forcing anyone interested to pay separately.
Difficulty: 3.5/5 TB:RB isn't a very difficult game, and that was to be expected. There are some surprisingly tricky songs on guitar, and a few somewhat hard songs and sections on drums, but really, this game is what it was thought to be. I'm actually thankful there aren't random not-even-there notes added to the tracks to make them more difficult. *cough* Activision.
Fun: 4.25/5 The Beatles: Rock Band, while probably well worth the $60 just for the experience, might not actually be worth it in the long run. The setlist of 45 songs is mostly great, with a few downers in the set, but the majority of the songs are really fun to play and/or at least listen to, and the backgrounds are all really cool. The menus look good, and there are - I believe - never-before-seen videos and photos, which are unlocked by doing well on songs. If you are a huge, huge, HUGE Beatles fan, this will be an instapurchase with no regrets. However, if you are just a fan, you might soon might wonder why you thought buying this was a good idea. There will be DLC weekly, according to HMX, so that will give this game virtually endless replayability for anybody that gets it.
Pros: A good 85% of the setlist is enjoyable to play, graphics are very good, it's the Beatles.
Cons: Some of the songs added on-disc seem random, only 45 songs, it's the Beatles. This could be a con to anyone that <3's difficulty. :P