DEFINITELY a 5 star place. For New York, there's a surprising amount of space, and the location was fantastic - half a block from the R train, great bagel spot nearby, bars and restaurants walking distance, short walk to Prospect Park, and you can even see the Statue of Liberty from the front porch. RJ was a brilliant host as well, and we were absolutely thrilled with our month-long stay.
Two things that were surprises for us (but did not really diminish our experience) - there is a dishwasher and a washer/dryer, but both are very New York. The dishwasher is tiny and doesn't fit full-size dinner plates but works great with most other dishes. The washer/dryer is all one machine, and the drying portion can take about 6+ hours.
Bottom line - if you want to be in Brooklyn, this is a fantastic landing spot.