We had 10 great days in NY - 2 parents and 5 children aged 1-18 years.
The apartment was perfect for our needs - lots of space and 3 bathrooms. It was spotlessly clean and the owners responded kindly to every request within minutes.
It is located in a quiet and safe yet colorful neighborhood. The 125th street metro is 5 minutes by foot and the sub takes you to downtown Manhattan in 20 minutes.
There are good supermarkets within 5 minutes walking distance - both ordinary and organic. Try the soulfood on the corner of 129th str. and Malcom X Blvd:)