The communication was really easy, and Georges and Mary were very friendly, with a special dedicace for Mary who so kindly took care of us during our stay . The flat, the room and the bathroom were clean and well-kept. The flat is very well located, with 4 underground lines, direct train line for Gatwick and Brighton and many buses a few minutes around. You can also walk to the main places in the center of London, it is not so far.
Choose this accommodation, it's really a good choice that you will not regret!