My wife and I have had a nice stay at Grace's place. Her apartment is well located, very close to the north border of Central Park and the area has places to eat, market and multiple options for transportation, including metro and bus. It is very easy to get downtown.
The bedroom and all apartment was very clean, well organized, and we had everything necessary. The area is safe and has a nice atmosphere.
Grace was in touch with us previously our arrival and did a complete checkin, she gives us info about the neighbourhood, best transport options, and about NY, it was very useful. She also was kind, respectful and warm as our host. We felt comfortable in Grace's place, and we had a great time in NY!
Thanks Grace for your attention, kindness and hospitality.
(The route that you've suggested to reach the airport worked very well)