first of all, i would say that i really love and hate this anime at the same time. There is no character that I can like even one in this anime but all of the characters the author made was reminded me that human being is a silly and fatuous deity. it made me think again of human being and solidify my way of thinking. it also reminded me that all of anime i have ever watch in my entire life is a fiction, no doubt. you dont need to think the moral conflict that author made in this show at the first place because it never gonna happen in real life, but since we are the great human being we have minds, a common sense, that makes it such a something to give a try to watch and think. so that is why i love and hate this anime.
for the every aspect i will elaborate it like these;
story: 8(very good)/10
art: 7(good)/10 (it still enjoyable for me even though the anime has been a decade old)
characterizations: 9(great)/10 (silly human deity)
sound: 7(good)/10
enjoyment: 6(fine)/10
overall: 9/10
i put it on "mixed feeling" because not everyone can enjoy this show, its some deep anime and less enjoyment if you are not into horror mystery genre.