Story: 10. Kept me on the edge of my seat. Plot was great and had just the right amount of unexpected twists, which I like.
Art: 10. I like the design. It seemed pretty modern and the animation was great.
Sound: 9. Overall, it was great. I feel like they could have done better, though.
Character: 8. Shibazaki was a decent character with a decent background, but other than him, the other characters' pasts and backgrounds were not really mentioned other than in short flashbacks.
Enjoyment: 10. This makes a good thriller anime for those of you who are thriller fans. I am one myself, and I have seen lots of thriller anime to determine what is good and what is bad.
Overall: 10. The character build could use some improvement, but the plot is great and that is what I look for in a good thriller anime.