Justin and Shirley are a really nice couple. They received us well, they gave us good advices (where to eat, what to do, and so on), and they always made us feel cormfortable.
The neighborhood is great. You have lots of nice places to eat, cool stores, two subway stations nearby (L and J train), live music (the knitting factory) and you can have a nice walk to the river and watch the Manhattan skyline from a non touristic place.
On the downside, the flat and the kitchen were sometimes a bit messy. Also they have two cats and the sandbox is in the bathroom, so sometimes it was a bit smelly.
The room was nice for a couple. They offered us clean towels and clean sheets and the size was ok.
I recomend staying with Justin, but only if you are cat-tolerant.