I stayed for 3 weeks at Chris' place, while I was in London to do research. The location of the house was in good walking distance to several underground lines, making it a convenient starting point for getting to work and for exploring the city. There are several supermarkets and shops around the area, and the kitchen in the apartment was also well-equipped. The room was slightly too small for home office, but it was possible to relocate to the kitchen if necessary. Furthermore, Chris was a very friendly host and always ready to help, whenever I had any questions!
I can highly recommend the place and I would not hesitate to go back, next time I am in London for a longer stay.