One of the big advantages of Airbnb is location. In the case of Zaklina's room, it was 15 minutes' walk from my mother's care home and the same distance from Southgate tube station. I took the tube to/from Heathrow without having to change lines and rolled my suitcase to her place, obviating the need to hire a car or even hail a cab. There is a 98% chance you will arrive at your LHR terminal on time.
Zaklina is extremely responsive and communicative, making my stay pleasurable. The room, bathroom and kitchen are very clean and bed+bedding extremely comfortable; I slept soundly. The photos dont lie, but just be aware there is not a huge amount of space in the bedroom (but enough for a small desk) or the kitchen. The size of the bathroom (shared with the other guest room, as is the kitchen) is very adequate. I will definitely consider staying there again next time I'm in London.