There’s really nothing wrong with it at all, technically it’s flawless. I think Francois Truffaut is an excellent director and has a very modest yet impacting vision. All the acting is well done and everything seems to fit the characters. The thing that makes me not see it as one of those “greatest movies ever made” is that I really don’t think the story or the message is all that interesting. I realize that a minimalist style was being used and that you aren’t supposed to respect Antoine, you either relate to him (and fall in love with the character) or you don’t. I saw him as being a little too much, it was as if he was a little too one noted. The story follows that same note, it doesn’t have a giant relevatory conclusion. It sort of just ends and that’s all there is, until the sequels that follow.