We were a party of 5 in Giancarlo' s place. He explained clearly how to reach the place and once arrived we should meet Ebony, the housekeeper, but unfortunately our flight arrived late and we couldn't meet her. They forgot we were 5 people, so everything was prepared for 4. Giancarlo and Ebony have been both very kind and responsive so we fixed the situation easily, moreover the apartment is well equipped and well furnished, there were extra sheets and pillows.
It is quite clean, although I would suggest a more thorough cleaning once in a while. It's close to the subway and Central Park, as well as located in a safe neighborhood. We have never felt unsafe. You have to consider the 5 flights of stairs with no elevator, but it wasn't a problem for us. I think it's a good base to explore NY.