Overall:
Overall I believe this is the best anime I have seen, but thats partly because I like the theme of it. Still both story and art technically it really is a good anime.
Story:
Well throughout worked story, even though sometimes a bit hard to follow, partly because of the complicated characters.
Art:
The art was simply outstanding, even though the the colour choice of the other side is sometimes - in my opinion - frustrating.
Sound:
Good... but nothing really outstanding
Character:
Well worked out, but sometimes a bit too hard to follow.
Enjoyment:
If enjoyment has anything to do with how interesting a show is than this show deserves a 10, but during this anime there were too many points were it was extremely interesting, but not really fun.
PS. Low level spoiler
For people like me who want to know whether a story has a happy end. It is. But it does not statisfies all questions.
