SPOILER FREE AND STRAIGHT FORWARD REVIEW
Story (8/10): the dystopien future with evil people in charge is nothing new, but the story is being told in an artistic and non-cliche way. I would have given 10, if they would have kept the same style until the end.
Art (8/10): the animations is quite rough and cheap, although the character designs are decent and the interiors look good. There are also some great, metaphorical and artsy scenes, making up for the rest.
Sound (10/10): You'll cry your eyes out while listening to them songs on repeat (beautiful lyrics too).
Character (10/10): The show has very few characters, but they are all greatly written, being diverse, flawed, intelligent and charming. Watching the main characters and their relationship evolve is heart touching.
Overall: 9/10 Not like the books or manga, but still amazing.