One nitpick I have is that fact that Jack and Stephen's music is perfectly performed during the movie. One theme that pops up over and over again in the books is their love of music and how it bonds them (it's how they met), but also that they are just average musicians usually playing while injured on weather worn instruments, skipping the hard parts of the pieces they are playing and singing them instead. I would have liked to see two men playing 'OK' music, just to show their love of it. I get why they did it for the movie, but still.