Our stay at this house was perfect. We were four people and each had a bed to sleep in. The upstairs is very spacious. It was a very hot week when we were there and the air conditioning was a plus! Although there was a little trouble trying to get into the house, everything was settled quickly because John was available by email and phone at all times.
The house is just a 3min walk to the station and walking distance from lots of restaurants and markets. It's also only a 10 minute walk from Columbia University.