I loved the OST, you can see they put a lot of budget into it. The music for the ending, opening and battles were awesome; honestly who would give budget for an orchestra to compose epic music for a "cartoon" nowadays... I loved the lyrics of the first opening.
The illustrations used for the ending song were awesome they matched perfectly to the music, sadly the anime got short in no giving more lore and meaning to them, the poster of Celiane and Apollonius in the song looked really bad ass, and the rest of illustrations were really good too. As for the animation, mostly all of it it was really good.
