I'd put this at about 2 1/2 stars....but I rounded up because I wasn't sure how much of my perception was skewed by it being an audiobook. 
 I will admit this reader is now officially burned out on vampire-based urban fantasy. That being said, I'll also agree with those who've referred to this a fast-food fiction. It's convenient, consumable, and filling. The prose had good flow, the pacing was snappy, and there were even a few points of deeply thoughtful dialogue. But ultimately, nothing that made me go "Oooo...that's new." 
 The "hero", Bones, was by far the highlight. But I couldn't form much attachment to Kat or any of the side characters. It also ended on a bit of a cliffhanger, which I don't tend to care for as a ploy to lure me into a series. (I like my book-by-book satisfaction--so sue me.) 
 If you're absolutely dying for some Buffy-like fanfiction with a Spike-centric feel, this could very well be your cup o' vampiric tea.