Stayed at Rick's property for a weekend during a work event / business trip. The place is comfortable, very well decorated, up-kept, and in good condition. The bedrooms were comfortable, the kitchen was big with plenty of amenities, good hot shower, and everything functioned well.
Overall it was a good stay in a location near some of Williamsburg's most popular sites / restaurants / bars / coffeeshops etc. The area specifically where the apt is located is a bit grungier, but you walk 5-10 minutes and you're in the nicer parts of Williamsburg.
The apt is a 30 second walk from a subway station which makes it extremely accessible if you need to move around Brooklyn / NYC. I would say, for a long stay it would annoy me since the train runs every couple of minutes, so you're constantly hearing the sound and vibrations of the train. I did not have any issues sleeping / with the sound - as it is not extremely annoying, but it is something to keep in mind if you're sensitive to these type of things.
It was perfect for a short stay as it was affordable, well-located within Brooklyn, and well-maintained / visually pleasent the inside of the apartment. I would go back.