I wrote an angry rant about it when I saw it last year. It was in every way a shit-tastic disappointment.
This is a movie I wanted to love, but ended up disgusted by the end. Horrible pacing, unnecessary changes to characters and story that serve only to make them worse, and the creation of a terrible story extension of Nui's character that pretty much shits all over her.
After watching it, I went home and watched episodes 3, 7, 12, and 20 and tried to forget what I had witnessed that day.