Sara's aparment is the perfect place to stay in NY if you want to be in a beautiful and safe neighbourhood. It's really cozy, spacious, clean and well equiped, besides, and probably my favorite part, it's so close from the museum mile in 5th Avenue, it will only take you about 15 minutes (or less if you walk fast =P) to get to Metropolitan Museum, Guggenheim and other Museum. Same to Central Park (close to Alice in Wonderland statue). 4 blocks away from 86th st subway station and about 6 stations from all NY major atractions. 3 blocks from a great supermarket and stores where you can buy anything you want. You can also find restaurants, cafes, even some pubs and small clubs.
Comfortable space for up to 4. You will have the whole apt to yourself.

I would definitely stay again in Sara and Bill's apt. They are so kind and lovely. Thanks for everything guys =)