You would think lengthy descriptions about the different New York settings would be a put off during the mystery, but it just adds to the story. I love Manhattan, so I find the history just as interesting as trying to figure out who the murderer is.
As far as the main characters go; Clare is still trying to keep Matteo at arms distance. Or so she tried that one night. Mike Quinn is back and his presence annoys Matteo. Which makes me laugh each time it happens. :)
Then there's Joy. Joy, Joy, Joy. I hope she doesn't turn into her dad.