I love this movie too... very distinct, even for a musical. I mean, Moulin Rouge has done the same, using pre-existing contemporary songs to substitute for most of the dialogue, but in this movie, it's different. It sort of contextualizes the Beatles' songs, giving new layer of meaning that many casual listeners often take for granted when listening to their songs.
This film, along with There Will Be Blood, Juno and Into The Wild, has been one of the best films I've seen recently.