We (1 adult + 2 kids aged 11 and 12) enjoyed our stay very much. The flat is charming, clean and comfortable.
The street is very quiet, but the famous Portobello Road is only ca 10 minutes walk away. We visited the bohemian Saturday street market on Portobello Road and it was a lovely experience.
Communicating with Riz was very easy - he answered my questions quickly, politely and thoroughly.
When we were eating breakfast in Riz's living room, we enjoyed the view of British mothers sending their kids (all in uniforms) to school. I caught myself thinking: "this is so much better than a boring hotel room".