This place is exactly as beautiful as the pictures and the description fits 100%.
J.K answered my mails within hours prior to my trip. When I arrived I was showed around the beautiful house and got a very useful instruction to everything.
The description states that check-in and check-out is flexible. And indeed it is. I arrived late - which was no problem. My flight out of New York was very late. I would have been happy to just be able to store my suitcase in the house until my departure, but J.K said I could have my room as long as needed. Very generous and very helpful - it made a huge difference.
Besides being beautiful my 'room' also included a walk-in dressing room, a very nice bathroom with a tub and a kitchen with washing machine and dryer. All to myself. And I could also use the kitchen down stairs.
The location is perfect. Brownstone streets, right next to restaurants, cafes, the park and a small supermarket. The subway is not around the corner, but a short walk away.
I can very much recommend this place - not just to parents.