I had a lovely stay at Siri's place. The room was just as described, and even better in reality, cosy and comfortable. There is a kettle in the room and really good coffee you can brew first thing in the morning. Siri and her husband were very helpful and nice to talk to. I was feeling a bit chilly, and they kindly adjusted the temperature in my room.
The area is calm and quiet, yet you can find all you need in proximity to the house - shops, fruit stalls and cafés. Archway tube station is just a short walk away, and connections to the city center and the airports (I used Stansted and Luton) are very good.
I strongly recommend this airbnb for your stay in London.