We arrived late (several train delays and getting lost on the tube!) but Lily was very welcoming! It was a wonderful place to stay. Very large room, and a well equipped kitchen on the same floor. It was chilly while we were there but the blankets were nice and warm.
It is a bit away from central London (you have to leave from London Bridge station to get to Brockley station, which is the closest one to Lily's house), but the trains to run late so we were able to watch shows in West End, eat a late dinner, and still make it back. Would definitely recommend, especially if you plan on a longer stay.