Staying at Shannon's was a perfect Airbnb experience. The place has everything you could need (washer, clothesline, kettle, towels, soap, shampoo and conditioner, hair dryer, private patio, full kitchen with stove and microwave and pans and cups, cutlery, butter, paper towels, and a recycling bin), and your host is quick to respond to emails and texts.
Location is paramount on a London vacation, and this place is just minutes away from two Tube stops (Waterloo and Southwark) and several bus stops -- so getting around the city is a breeze. You're close to Borough Market and the Tate Modern and the National Theatre. Restaurants and grocery shops are just a block or two away, and the street itself is pretty quiet (we rarely saw and never heard the neighbors).
The three-story house is built as efficiently as a submarine; everything tucked neatly into a clever cupboard. The only warning I'd give is that the staircases are polished wood with no handrails, so I'd advise bare feet instead of socks. We stayed with parents (with arthritic knees) and they were able to manage, but the place is not "accessible" in the U.S. definition.