Everyone will have a personal bias to some extent
I have read one of Kellers books but as not a New Yorker it didnt seem too relevant to me. He does seem to reach out to his sphere of influence, which is working New Yorkers it seems. So if you are one, you might find his sermons, preaching helpful
Many old time preachers seem to assume that all christians lives on a farm or house in the suburbs or is a stay at home mum or self satisfied baby boomer. What about the people trying to make rent in NYC apartments? Or the graduates of ivy league colleges? What about those people who have been workaholics all their lives serving wall street, how do they make a change and live as christians?