Neighborhood was great. Close to Central Park and Midtown. Most of the sights is reachable on foot (Times Square, 30 Rock, Broadway, Empire State Building, MSG...) Subway is only really needed for going downtown or to other boroughs.
The apartment is as advertised. Clean and tidy. Modern, perfectly furnished. Paul was a great host. Always responsive and kind enough to let me check out later as my flight was leaving in the evening. I get to spend my last day in Central Park without the hassle of dragging my luggage with me.
For the apartment, as mentioned, its on the 5th floor, with no elevator, so count with it.
Its also worth mentioning that the radiators are loud. Its not the apartments fault though, its a NYC specialty. Its the same all around NYC, in these prewar buildings. So just to be aware in case you've never been to NYC. I get used to them after a day. Plus, there is a fireplace in the living room and two additional heaters, so the radiators can be turned off.
Overall, great experience.