I've stayed for about a month in Beatrice's house, and I have to say this stay absolutely helped me a lot to getting used to my London Life.
Her place is in a great location with easy access to all around the city - 2 tube line(victoria, picadilly line), overground and buses. I could walk home safely at night because it is very close to main road and there are a lot of shops(Waitrose, Tesco, 24-hour supermarket..) near the house.
The room is beautiful, cozy, quite and clean - suitable for solo traveler. I love to see a beautiful view through the window all the time. Also I could use kitchen(fridge, kitchenware, dished..), garden, shower room/toilet freely.
Beatrice is the most wonderful host. she is kind, welcoming and very helpful. Our communication was great and I visited fantasic local spots thanks to her recommend. I would definitely suggest this house for your london stay:)