We really enjoyed our stay at Mike and Jenny's place. It was clean, comfortable and very easy to reach (about a 5 minute walk from Green Park underground station). We didn't get a chance to meet Jenny, but Mike was super nice, and he made us feel right at home when we arrived.
Overall, we found it to be excellent value for the money, a really rare gem in an expensive city like London, and would not hesitate to stay there again if we get a chance to return to London one day.