I was in London for a three-month intensive course. The flat was within walking distance to the campus and served as a wonderful home-base for those three months. It's right above a small market, close to major tube and bus lines, and is a very short walk to the Tower and Tower Bridge. The area is dead on the weekends, as it's mostly a place where people commute in to work during the week; this meant that the local cafes and coffeeshops were closed on the weekends, but it also meant calm and quiet.
Andrew was an excellent host. There was clear communication from before we even arrived, and he was always quick to respond to any messages sent. Additionally, when we had an issue with one of the appliances, he got it repaired quickly. We had such a smooth stay at this flat, and Andrew played a significant part in that.