Ok. First things first. The room is huge. The title is accurate.
Second, yep, you guessed it, it's serene. Which sounds like an oxymoron for one of the biggest cities in the world, but it's 100% true. You won't be bothered by street noise, sirens or anything else. So on days when you've walked 10-13 miles in the city doing everything from eating more dumplings than you should, to finally connecting on an emotional level with a painting, you'll be able to rest peacefully at Mario's place.
Third, Mario is a great guy. He knows New York and can give you some great insight.
Things I loved:
His communication. He went out of his way to accommodate us.
The space. Those high ceilings... plus the bedroom, kitchen and bathroom all made me feel relaxed as opposed to cramped.
The comfort. The beds were comfortable, the room was warm, and there were extra blankets in the closet when the temperature dipped at night.
The location. You probably won't find a better place to stay in Brooklyn. A few minutes from most any subway you'll need to take. Easy to get anywhere on the east or west side in manhattan.
The value. Great for multiple people to stay in the city.
5/5 would book again/recommend.