The place is in the best location you could ever wish for. It is 10 minutes away from the train and underground station, and its walking distance from Hyde Park, Portobello Road, and many other popular spots. The place itself is very cosy, small but not crowded. It is a very safe neighbourhood, and the lock system that Patrick has on the main entrance and bedrooms adds to the feeling of safety.
Also about the railroad being right behind the house: yes you can hear the trains, no its not too loud. The windows do a great job cancelling the noise at night.
Overall we had a great experience and we would surely love to return on our next trips.