We stayed two nights with Mathias and Sally, who were perfect hosts. Friendly and welcoming, they made sure we had everything we needed. The bedroom, though quite small, was very clean, with a comfortable bed and a big window facing away from the street, so the room was very quiet. The kitchen was also clean and well appointed, as was the lounge.
The flat is situated close to bus and overground rail routes, and you can walk across the river to Chelsea in a few minutes.
On Mathias's recommendation we ate at Boqueria at the end of the street - you won't find better tapas outside Spain!
We would struggle to find any negatives. All in all, Mathias and Sally's place was perfect for our working visit; we would stay there again and recommend it to any visitor to London. Thanks, guys!