If you are a Beatles fan, you should very much enjoy listening to this album, providing you buy it knowing exactly what the album is. It is not another 'studio' album, it is a soundtrack album. Tracks 7-13 are orchestrations by George Martin used in the film, and are wonderfully imaginative, sounding like they belong in a drugged-up Disney film.
Only 4 of the first 6 tracks are new ('All You Need Is Love' and of course, 'Yellow Submarine' are tacked on to it). Of the two George Harrison Tracks, 'Only A Northern Song' is somewhat charming with simplistic yet effective lyrics- it is very easy to listen to. 'It's All Too Much' has been labelled by Rolling Stone as one of the top five all-time psychedelic freakouts and with good reason! It also has arguably the best guitar work in all the Beatles catalogue.
'All Together Now' is admittedly annoying but is perfectly placed on this album- it WILL get stuck in your head! 'Hey Bulldog' is widely seen as the pick of the bunch, apparently the last genuine collaboration between Lennon and McCartney and is a fantastic pop/rock track.
My advice is to buy this album if you are a big Beatles fan, as long as you are aware that The Beatles were not trying to produce another classic, instead just produce the obligatory soundtrack and remember; if you are really not bothered about the orchestrations, there is 'Yellow Submarine Songtrack,' a Beatles 'best of' containing all 4 of the new tracks to Yellow Submarine. Enjoy!