We were 7 hours late due to flight delays which meant that we arrived at 2.30 am! Despite that Caroline was at the door to greet us and show is to our room. The airline also lost our luggage, Caroline's mum was available, and willing to be on hand to receive our bags in the days that followed. This meant that our sightseeing in NYC was not affected.
I feel I should explain why I gave 4 stars and not 5.
When you enter the building, in order to get to the apartment you have to walk past the doors to the ground floor apartments in which there was obviously a smoker. On all 3 evenings of our stay we had to walk through thick smoke before climbing the stairs to the accommodation. That for us was unpleasant. Hence 4 star review. Otherwise our stay was enjoyable. Extremely friendly and accommodating hosts. Thank you!