It's not difficult to describe this movie. It's a remake of Hair with 
  Beatles songs substituted for the original songs. Oh, nobody had admitted that 
  officially, but it's pretty much the same movie. In case you've 
  forgotten Hair, it's a Vietnam-era musical with singing and dancing hippies, 
  singing and dancing draft physicals, etc. Love stories are interwoven with the 
  snapshots of the hippie-era cultural landscape. There isn't much more you need 
  to know. The main difference in the new films, besides the new Beatles 
  arrangements, is that 
  Across the Universe has the benefit of hindsight. Over the years, some 
  memories of events and people which were vivid at the time have faded, and our 
  images of the late 60s have coalesced into a few shorthand images: Peter Max 
  posters, Vietnam, Jimi Hendrix, Bobby Kennedy's assassination, psychedelic 
  images, lava lamps, Janis Joplin, draft notices, Ken Kesey, Kent State, free 
  love, Che posters, Timothy Leary ... and the Beatles. Across the Universe 
  populated its scenes with those images and characters. Bono plays a Ken Kesey 
  clone. There's a Jimi clone, and a Janis clone, and mention of a "Dr. Geary."
  The film received about a 50% score at Rotten Tomatoes, but not in the 
  usual way. More often than not, such a score is the result of many middling 
  reviews which might have gone either way with a bit of a nudge. In this case 
  the score resulted from some passionate "yeas" and "nays." Roger Ebert, for 
  example, gave the film his highest rating (****), saying:
  
    "Julie Taymor's Across the Universe is an audacious marriage of 
    cutting-edge visual techniques, heart-warming performances, 1960s history 
    and the Beatles songbook. Sounds like a concept that might be behind its 
    time, but I believe in yesterday. I was drowning in movies and deadlines, 
    and this was the only one I went to see twice."
  
  On the other side of the ledger, The Guardian gave the film its lowest 
  possible rating (1 star out of 5), and Premiere magazine said:
  
    "A few folks I've heard have defended this film on account of its having 
    its heart in the right place. I don't really know where its heart is, quite 
    frankly, but I know for sure said heart isn't doing its job of pumping blood 
    to the brain very well."
  
  And James Berardinelli wrote:
  
    "The songs are a bigger distraction than the visuals. With only a few 
    exceptions, most of them are out of place. They are shoehorned in simply to 
    increase the film's Beatles music content. The expected approach in a 
    musical is for the songs to advance the story. In Across the Universe, 
    the narrative pauses roughly every seven minutes so the characters can break 
    into song, then resumes when they're done. This approach makes it impossible 
    to identify with the characters or be interested in their circumstances. 
    And, while the singing is of variable quality, most of the dance numbers are 
    amateurish." 
  
  I suppose those reviews may tell you as much about the reviewers than about 
  the movie. It isn't my kind of entertainment, so I couldn't wait for it to 
  end, but the film has gigantic positives: director Julie Taymor is brilliant 
  at staging bold, ambitious, often symbolic visual set pieces and she used 33 
  Beatles songs in whole or part. Enough people found that entertaining to earn 
  the film very high ratings at Yahoo and IMDb. The film also has gigantic negatives: it's 
  virtually humorless, it's too similar to Hair, and everything about its 
  non-musical content is either patently obvious, completely superficial, or a 
  60s cliché used as a short cut replacement for actual thinking. And none of the 
  Beatles songs are originals, so people will have varying reactions to the new 
  cover versions. I believe that your appreciation of the film will depend how 
  you weigh each of those characteristics. If you want to be dazzled with an 
  often surreal visual extravaganza set to Beatles songs, and you don't care 
  that the songs are performed by others, it's your kind of movie, as it was 
  Ebert's. If you're looking for an authentic look at the 60s told in music, 
  just re-watch Hair, which was written by real Age of Aquarians.