We didn't get the chance to see Stuart but he was extremely reactive before and during our stay. We were welcomed by one of his neighbour, who was very nice.
Stuart was so convenient with us ! We arrived one hour before scheduled time but we had the chance to get in the flat. Plus, he let us stay as long as we wanted the last day.
The flat is very well located, just next to an underground station (2 min by foot) and next to Portobello Road. It looks out onto a yard so it's also quiet. It's a small flat but nice for 2 people.