We enjoyed our stay at Grace's apartment very much. She was very welcoming and made sure to stay away the whole time so it almost felt like we had the apartment to ourselves. When we arrived she gave us tips on the best subway to use, where to go food shopping etc.
It is in a great location, just 5 mins from subway line 2 and 3 and 10 mins from a lovely supermarket and cafes. It is also 5 mins walk from Central Park. We fell in love with the whole Upper West Side area straight away and enjoyed exploring it very much.
The apartment is VERY clean - lovely kitchen and bathroom with a strong hot shower. Bed was comfy.
The only thing I would point out is that the flat appears very bright in the photos but in reality it is quite dark with all windows leading into a wall of oposite building - lights on are a must all day long. Hardly a problem if you are out and about exploring NYC all day long like us! As it is an older apartment we found the floor was very squeaky, the walls were very thin and we couldn't have the heating on at night because it kept making popping noises and we couldn't sleep because of it. There is no TV in the flat at the moment. All these are minor issues as the price Grace charges is an absolute bargain for such a great area and such a clean place!
I would definitely consider staying at Grace's apartment again and I would recommend it for anyone who plans to spend most of the days out.