This was a very interesting anime. I loved the story line and how the main heroine developed through the story but I think the storyline was too short. The show could have had more episodes in it because it was too quick.
I loved the voice actress who portrayed Saya. It really brought out the character. The art, by CLAMP is of course, amazing! Although I have to say its too gory for my taste. Way more gory than Blood+ for sure. I'm only giving it a 9 for the sound because they really got the bone crushing, pulling apart limbs from limbs, and chewing sound down. Also I loved the music :)
I'd recommend this anime to viewers who love bloody anime, a quick storyline, loves CLAMP artwork, a lot of action, and doesn't mind having a few nightmares.