Ernesto's apartment is the best airbnb place that I've lived in at London.
1) Location: the apartment is located at a superb location. Very easily accessible and literally just a stone's throw away from the tube.
2) Comfort: his apartment is clean, stylish, and he's a great host. You'd expect that being so close to the tube, it can be quite noisy; however, this is not true. Ernesto's apartment is as quiet as a library.