The story is beautiful and the animation is outstanding. I'm sure it's true to the story of the manga. The story is exciting and the characters are well developed.
Unfortunately, what I don't like is that it was adapted as a movie. There are details where the thread of a character's story is quickly told in 5 minutes. Because of this, I think the story is rushed and not coherent. This creates a sense of absence in the viewer. Although this manga adaptation is made as a two part movie, it feels like it would work better as a TV series because of the many events.
I think the scene editors also struggled a lot with how to unify a manga originally intended for a TV series? It more or less succeeded.
Each story chapter was separated by a 1-second black screen (pause). Well, this created an amazing sense of lack and disunity for me. I think all of this could have been solved by possibly separating each section with the title of the chapter, so that would have worked very well.
All in all, it's a nice anime, faithful to the manga, but it doesn't fit the movie format.