Stephanie's place was very comfortable (the circular bed is awesome), clean and well equipped with very fast (fibre) broadband.
The flat is relatively close to Brixton - about 10 minutes bus ride or a lovely walk (probably about 20 minutes) through Brockwell Park which is open during daylight hours.
There is a small supermarket a few minutes walk away (Tesco Metro) which stocks essentials and has a surprising range of gluten and dairy free products.
We didn't met Stephanie in person but she responded very quickly to any questions we had.
We would definitely recommend staying there.