We stayed almost from Sunday to Friday in Guy's place. The location is very convenient, close to the tube station and nice cafes. The kitchen and bathroom are well equipped and clean. Guy was very diligent and the communication was always fluid.
The problem with the place is that is very dark and needs to be ventilated. The photos show a luminous place, which unfortunately it's far from reality. The sleeping quality is poor (the mattress is in really bad conditions).
Having said so, it's still value for money, considering the prices in London.