Peter's home was in a lovely, quiet safe walkable neighborhood. His rental was immaculate, comfortable, very roomy (we were 4 adults) and had everything you could need. We stayed for a week and there were plenty of soaps, cleaning supplies, quality toilet paper, paper towels, extra bedding, thick towels etc. Even umbrellas and metro cards. Peter made it a breeze checking in to his home and asked us how we were doing and if we needed anything.
We were able to park our rental car with a permit Peter provided so we could visit Mount Vernon, Harper's Ferry, Great Falls National Park and shop. Street parking is free on the weekends.
We would definately stay at Mr B's on S again if visiting Washington DC.