I can only recommend Mary as an airbnb host. In fact, I cannot recommend her enough.
I felt instantly at home. Mary is so warm and welcoming, in one word: lovely. Honestly, this was the best airbnb experience I had in all those years.
The house is big and clean with a nice little garden. The house rules are sensible and easy to follow. The bed was very comfy. And you'll find anything you need for cooking, doing the laundry and the like. It is not far to Brixton station and Brixton itself is a nice neighbourhood.
Mary supplied me not only with ideas of what to do in London, she also shared her Tate membership card with me so I wouldn't have to pay the entrance fee. (Unfortunately, I really suck at being a tourist, so I hardly scratched the surface of all the benefits I got from staying at Mary's.)
I had a great time and I will be back for sure, not only to visit London again but to see Mary as well.