This place was perfect for our extended family!
We were three couples with three adult "kids" and a toddler. The living/kitchen area was a little tight when we were all there (just one couch) but the table had seating for eight, so it worked out fine.
Lots of TVs. Strong wi-fi. Note that there's a staircase (20 steps?) to the apt.
The location is great. Direct subway to elsewhere in Brooklyn, plus Manhattan. It's a very friendly residential neighborhood. There aren't many coffee shops or sit-down restaurants, but there's great Caribbean takeout.
The kitchen is well equipped: kettle, toaster, full-sized fridge. The dishwasher is tiny but it does the job! You might want to bring coffee, cone filters for the four-cup coffee maker and paper towels.
If you're bothered by sunlight, bring sleeping masks; bedrooms have skylights and/or thin blinds. The beds are very comfortable and there's lots of closet space.
Frank answered all our questions quickly, clearly and kindly.