I stayed with Miranda and James (and their beautiful family) for a week, and had the most lovely stay.
The room and bathroom (which is essentially en-suite) were absolutely spotless and brand new, and the whole house was beautiful. I don't think the photos on here do it justice.
I'd never rented an individual room on AirBnB before rather than a whole house, but both of them were incredibly warm and welcoming and totally put me at ease.
If you're looking for a place to stay in SE London I'd highly recommend them!