It was great staying at John's!
It was my first experience with Airbnb and I was expecting worse.
The flat is only 50 minutes away from Piccadilly Circus, which is not far for London! And it's only £2,70. The area is nice and quite and he has a great view. The only access to the kitchen is through the room I slept in but this didn't matter and I had my privacy! There was just one problem in the flat, that it's not possible to have a normal shower, I really need to ask him, how he does that.
John was the perfect host! He helped me a lot, because I was sick and cared for me like a good friend.
If I go back to London, I would definitely contact him again! (maybe then he explains to me how to use his shower)