Although I did not have much interaction, Carlos and his family seemed nice. Carlos is also very nice. I arrived at a late hour without having eaten dinner, and Carlos let me make a sandwich.
The location is wonderful. There are multiple underground stations in a short walk's distance so it is easy to get around London.
On the downside, not by the fault of the hosts, there is a neighbor who smokes weed constantly, so keeping the window open (I didn't get acquainted with temperature control) is difficult. The bed is slightly rough--you can actually feel the springs.