I had a wonderful stay at Jeanine & Sergio's place. The apartment is in a great location, close to several different subway lines (most conveniently the A and D express lines). It's also walking distance from Central Park, Columbia University and many shops and restaurants.
The apartment itself was clean and comfortable, and Jeanine went above and beyond to make sure I felt at home. She was a fantastic host and had lots of great tips about what to do in the city and how to get around.
If I ever find myself back in NYC I wouldn't hesitate to stay here again!