Mathias and Sally were awesome. They were quick to answer me when I contacted them and they patiently answered the load of questions that I threw at them. Their apartment is beautiful and clean, and central London is very accessible from their location (2 nearby train/metro stations, at least 3 different bus lines that took us directly to where we wanted to be in the center of London). They're very accommodating and sweet, they give you privacy and complete use of the kitchen, and they provide an awesome breakfast. Thanks for everything!