I stayed for three nights and had a very full schedule, so I was out most of the time and did not meet Peter and Melanie. But I felt very welcome, the instructions to get into the apartment were very clear and easy. The room was big and clean, the bed comfy - and the train rumbling actually is comforting.
The location is absolutely ideal (even when half of the tube lines and trains were not in service, I always was able to get to places easily). The cafés on Exmouth market have very yummy food. Overall I enjoyed staying at the apartment.