I can say with full confidence that Sarah is the best. You will enjoy her company and staying at her place much than 99% of other NYC listings here, where you would be just another guest, maybe even contacted only by phone. Because New York is not just the city, it is also the people who live there, and Sarah, as a long time newyorker, should be your first choice for your host, period.
Clinton Hill is one of the most friendly and beautiful neighbourhoods in NYC. Back in the 19th century, when the Brooklyn Bridge was being built, wealthy Brooklynites who lived in Brooklyn Heights relocated to this place to avoid 'new folks' who they thought would flow in large numbers from Manhattan. So you have tree lined streets with old historic brownstones on boths sides that they built and in which they lived. Of course over the decades the demographics has changed, but if you know Brooklyn as a whole, you will not get find many better hoods like this one.
Subway stop (C) and CitiBike station are just around the corner (Fulton/Washington Av), ideal for commuting to whatever place you want. There is a 24/7 grocery shop on the block on your way to subway, market on a neighbouring block, and 24h laundry place few blocks further.
The apt itself is clean, cosy, and beautiful, decorated with taste. You will get a lot of privacy, if you want, but can hang out in the living room if you prefer that. Water pressure is great (think of the Shower Head episode of Seinfeld).
I slept comfortably, and despite that the room is on the smaller side I could even unpack my 50lb suitcase for entire 29-day stay. Of course, you get your own keys.
So, folks don't get lured by other listings on this site, because this is all you will ever want. Just please don't book it when I will be coming back to NYC, this place is mine!