Waldemar is a very kind person and his flat is very nice, exactly what you see in the pictures. The room is cozy and very quiet. I slept with the door to the patio open, which I guess is unusual for NYC. The area has a lot to offer, many bars, cafes, and a great museum, all in walking distance. Several subway lines are also close.
If you are visiting Brooklyn and NYC (Manhattan isn't too far either) and you need a room to rest, this is a great place to stay. The patio is also super nice, I spent an entire morning there relaxing and working.
I highly recommend this place