Had a great time at Mark's place. The unit is quite specious, perfect for one or two travelers. The space heater keeps the place toasty warm even in the winter. Right next to several train stops, including the A and C line, which makes getting to and from Manhattan easy. Mark is very communicative and obliging. You can tell he really cares about the quality of the experience. It's true that in the late morning you can hear the day care next door, but it's nothing too chaotic and it will give you an excuse to leave and go walk around the neighborhood.
The neighborhood has so much character. The vibe changes from street to street so it's worth it to explore a little. My advise, go to the Lazy Ibis a few streets over for an Americano and/or Breakfast. So tasty. Prospect park is a nice morning run. One of my only regrets from my trip, is that I didn't go to the Brooklyn museum which is quite close.
Overall, I would say Mark's home is a fun place to stay.