This was our second stay at Sam's flat, and if we ever travel to London a third time we will stay there again. The flat is spacious, well-equipped, in a nice neighborhood, and within walking distance to the underground and overground. Communication with Sam is quick and easy, plus his Aunt Jo lives 2 flats away so she helps out a lot.
Last year when I was choosing an airbnb, I did a lot of research and made the decision to stay in Putney, which is west of London. This past year we actually missed Putney and Sam's place and it was a big factor in deciding to travel to London again. I definitely recommend booking this airbnb. You will be close enough to the city to get to where you need within 30 minutes or less, and at night will be able to relax in a great apartment.