Kensington is a safe neighborhood. It's very diverse - very Brooklynish combination of different nationalities. There's not much to see or do but the area is quite close to Prospect Park, which is a beautiful park. The subway ride from Manhattan takes about 30mins.
Jason's place is clean and centrally located - about 5mins walk from the Church Av subway stop. The room is small and simple, nothing extra. Just a bed and a small table. But the room is def worth the money.
Jason and his mum are super kind, and they take good care of their guests. They even made me breakfast! Most of the times you don't even see them around, so you can keep your privacy.