I know Nana thanks to the anime, which I love. Both, the movie and the anime are good. It is certain the movie length needs to cut out some threads and in my opinion, this is a great pity. I suppose I would be satisfied if they made a drama, which was true copy of the original.
However, I should praise the stylization and characterization of the main characters. They took care of every detail.
Of course, the music is amazing too. Now, I know many Itou Yuna's songs!