We loved Julien's place. I've been there with my girlfriend for about a week and everything was fine. We arrived pretty late in london but it seemed not to be a problem for him and we had a nice welcome. The room was just as diplayed: a pretty large bedroom with a kithcen and a small but comfortable bathroom.There was no problem whatsoever with the rest of the people in the house and also the neighborhood was fine.
We actually never met Julien again during our stay, but we didn't really need to, we could text or call him anytime.
So I really suggest this place for a nice stay in London!