The movie constantly teases Beatles songs then never plays them. Even worse, they turned "Help!" into some sort of screaming heavy metal song! The story is boring and the main character is annoying. There isn't enough music from The Beatles in it and most of the scenes from the trailer are either misrepresented or never occurred through out the film. The most notable one is the part in the trailer where Jack plays "something" for a women that doesn't appear at all in the movie.
Good stuff:
-John Lennon
-Credits music
Cons:
-The characters feel dry and one dimensional
-The plot holes are larger and in greater number than the 4000 holes in Black Burn Lancashire
-There aren't any cameos by the Paul or Ringo
-There aren't any real references
-There is more modern pop than Beatles music
-The concept isn't explored enough
-Why no one remembers The Beatles is never explained
-The main story line feels like a side plot because of the bad love triangle
-etc.