Maria's flat is lovely and the location in Kensington is great. Restaurants and pubs are within walking distance and the Tube station is a few minutes away. This is neighborhood is more residential than other areas of London, so nightlife, theater, etc. would require a Tube or taxi ride to the central part of London.
The flat has a lovely rooftop area - although too cold this time of year. Also a private park across the street. Be advised that the flat is on the third floor - lots of stairs! Nice view of the area.
Maria is very nice and helped with our luggage, as well as booking our cab ride to the airport. She also told us about some favorite pubs and eateries. We enjoyed our stay immensely!