On Dusty's recommendation,
I'll probably finish it tomorrow. I'm really liking it. It's almost too campy at times, but the profanity counters that nicely.
On a side note, my wife is reading this, which alerted her to the fact that Seanan McGuire is an active writer of Buffy (and other) fan fiction. Now, even more than before she mentioned this to me, I'm basically reading this as a Buffy novel.