This was quite a experience. It grabbed my attention since the beginning. The characters personalities are quite well written. I'm not sure about what to think about the ending, though. It felt a bit rushed.
On the down side: Reapers Critic is good as a small visual story, but it doesn't have too much gameplay yet.
[MINI SPOILER ALERT] There's an important inconsistency in the beginning of the story. If I recall correctly, when Minami calls Arthur for telling him about the new crime, she mentions the 30 secs app during the call. However, Arthur is surprised when she shows it to him in the crime scene. I don't really found that natural. [MINI SPOILER ALERT]