I stayed with Dan and his girlfriend Susan for just around a month as I had an internship in NYC. All I can say is that my stay with them exceeded all of my expectations. The location is great in that it is in a great part of Manhattan and it is also very easy to get to the subway lines. The place is also very, very spacious for a place in Manhattan and looks even bigger than the pictures. There is air conditioning for the hotter months as well. I also did not have a problem with street noise, but they do have ear plugs just in case.
Dan and Susan are also great people to be hosts. They have lived in the city for years and know so many things to do. They are also just great people. I loved my stay, and will definitely be contacting them whenever I am back in the city.