We, a family of four with two children in their early teens, had a really great time in Chantal's Brooklyn apartment. We spent four nights there.
Check-in was super easy, and Chantal was always responsive and available, if we had any questions. Communication with her was great. She and her family live in the same house, upstairs, so you know that you are staying at a family well-connected to the local community, not some anonymous proprietors.
The apartment was clean, the kitchen very well equipped, the sofa big enough for four to sit on and for two to sleep on. The AC is modern, but because of the old brownstone's construction, it was naturally cool enough anyway, although we were when it was extremely hot outside (up to 38°C). The wifi was very fast and absolutely reliable at all times.
We loved the neighbourhood (Bed-Stuy). Read about it before arriving there, it will help you getting around. It's a vibrant, friendly and diverse neighbourhood with some good restaurants just around the corner.
The nearest subway station is about a 10 minutes walk, and there are several bus stations right on or around the corner. Overall we had no problems with public transport at all and got to all the places we wanted to.
Bottom line: the place is highly recommended and we could imagine staying there again!