It's hard to give an overall rating to a collection, and this is a real mixed bag, so I'll settle on 3.5 overall.

I thought the opening Faith story was great, if a little hard to adjust to seeing the Mayor's "afterlife". Unfortunately the collection took a bit of a turn for me with Blood of Carthage; I didn't hugely enjoy it and found it quite hard to get engaged, which is a shame as it made up over half the book. 

I did enjoy Heart of a Slayer and Cemetery of Lost Love, but the Oz story I also felt was a little underwhelming, and didn't love it!