This is a crime series but there are way to many plotholes, and they are BIG ones. At the end of the series they reveal information that could have been easily used in the beginning of the series to solve the case but they didn't use it till the end because a 1, or 2, episode series wouldn't be nice. Which is sad because the crime aspect was interesting. There are also some inconsistencies with what they say during the autopsy and what we see that happens during the murder, but it's easy to ignore (unlike my last plothole).
The relationship with Tan an Bunn, I feel it's rushed and a bit out of place, since it starts while Bun still suspect Tan killed his best friend (this isn't a spoiler since we know she dies and Tan is a suspect sin episode 1).
However, I still recommend, I really enjoyed it. Who the murder is, and the whole case, does makes sense and unfolds in an interesting way. I am currently watching it again (with my boyfriend), we are in chapter 4 and he's enjoying it aswell.