It was a great movie, I really enjoyed it to the fullest. The plot was good, art was nice and the music... well let's say that there is one ala Sephirot momentum music ;P - ok.
It was great to see the new, cute and shy, Nagato, as well as all main characters from different time lines ;D.
The biggest character development had Kyon - finally admiting that he loves the willd and interesting world with he will protect with all his might and Nagato - at the end of the film she covers her smile with a book
The movie is super long, yet I wasn't bored(at least in a way that I would fall a sleep ;p)even for a moment, especially in the later part. It's actually shocking that it is possible to create a movie that long that isn't boring and that covers so well the material from the original work(I think ;P).
Well, what to say, I gave it a 6/6