Story: I found the story interesting however very incomplete. =/ In the beginning I had a little trouble getting into it but after I did, I enjoyed it very thoroughly. ^^ However the ending was terrible. Dx I didn't get it at all. I know there's a second season out there but still.
Art: I think it was done well.
Sound: I did love some of the soundtracks. =DD However the second opening drove me crazy. I disliked it very much.
Character: I loved the characters. (Except for some useless and insane ones) But sadly during the end, they all turned crazy so I blame that on the coordination of the story as well. xD
Enjoyment: I enjoyed this show though. ^^ I finished all the episodes within two days, xDD.