We had a very nice stay at David's apartment. The flat was exactly as described, in a great location, close to the main sights and to public transport.
Our flight was 8 hours late, but David helped us with our baggages in the middle of the night and was very kind and helpful for the whole time. He explained everything we needed about the flat and New York itself. I think we are very lucky as we found this apartment, I would recommend it to everyone - great location, nice apartment, helpful host! :)