Good world building, consistent, "believable."
Nicely laid out.
Listened to the Audible version. Had my doubts about the narrator, but ended up really enjoying it. The narrator seemed a little too disaffected at first, but she evened out and I enjoyed it immensely.
The only down side is there is another "love" triangle a la Stephanie Plum, but with vampires, werewolves, and witches. That is not a favorite trope of mine, but so far it is not too bad.