We enjoyed our stay in Christopher's apartment very much. The location is perfect and not too far away from the city center. The flat is spacious and perfect for 4 people. Checkin in and out worked out pretty well and the key was easy to find. The only negative points are that there was a leek in the bathroom and that the lock of the door is a bit tricky. Otherwise the flat is perfect for a nice trip to London and Christopher and his colleague a perfect host.