My stay at Nancy's place was absolutely fantastic. I stayed there for a total of six days/five nights, but when I left, I felt like I had known Nancy for years. I had some problems at the airport so I arrived a little later than planned, but she was very understanding. She immediately made me feel at home, she arranged a great breakfast in the mornings and she gave me very helpful advice on the city. She had some extra tickets for the Guggenheim Museum and we went to the Met too. Her apartment is clean, cozy and the couch is very comfortable. The Upper East Side apartment is located close to shops, restaurants, the Museum Mile(the Met, Guggenheim and many more) and 5th ave that runs along Central Park.
I can definitely recommend staying with her and her kind and lovely cat, Rocky.