Sandra's flat is so well situated that you can walk just about anywhere--Hyde Park, of course, but also to the West End theatres, the National Gallery, China Town. The flat itself is small and comfortable, in a quiet neighborhood, but so close to Paddington Station so that, if you come in from Heathrow on the train, you can walk to Sandra's flat in under ten minutes--even with luggage.
Sandra herself is communicative and easy to talk to. This is very good value for money.