We (family of 4, kids were 9 and 11 years old) had a wonderful time in Riz's apartments. Communication and check-in was just easy.
The flat itself is in a quiet street in a quite normal London neighborhood. This is what we were looking for, not the tourist areas. Several pubs and restaurants were in there neighborhood, also supermarkets open until late (we went to the Coop). It is a 4 min walk to the tube station (7 stops to King's Cross/St. Pancras) , also several buses are very close.
It is also quite close to the famous areas of Notting Hill, Portobello road approx. 500 m away.
The flat really had atmosphere (Riz actually lives in the place when not having guests there), very comfortable beds, kitchen with everything you need. Heating was amazing (we visited in February). Wifi worked very well and the little Sonos loudspeaker allowed us to play out favorite Spotify playlists like at home.
If we visit London again we will very likely try to stay at Riz's place again.