We enjoyed our stay very much. Very good location: walking distance from Central Park, 5th Avenue, Madison Avenue, many supermarkets, and much more. Very nice, quite neighbourhood with almost no city noice. Also all the people we met by going in and out of the building were very friendly. It's a very nice apartment and makes you feel at home instantly and it has all it needs for a short stay.
Also the communication from the beginning until we left went flawless. The response time was always very fast and no question or request was too much.
I can definitely advice this location to have unforgettable moments in New York.