Rupert and Victoria are really great hosts.
The flat is comfy, beautiful and really close to public transports.
It is a bit from central London but if you miss the bus you will just have to wait another 10 min to get another. There are night bus too, all conditions are required for a day/night trip to the city and the trip back.
The surroundings are really beautiful too, and you can walk all the way too Brixton by feet without too much problem.
We even saw squirrels and a few foxes just at the corner of the street, a great place to stay !