After one month living with Sarolta I only have good things to say about her. I had an issue with my previous flat (Water leaking everywhere) and she accepted a long stay after understand my situation. Not a single problem with her, the most clean and respectful person I've been living with. I wanted to make the room as my permanent place for this year but she had another bookings for this summer and that was not possible.
The underground is just 5 min walk and also if you prefer go to central London with bus the station is just 30 seconds walking from the room, in 40 minutes you'll be in central London.
If I need again a short/medium term stay I will contact with her as a first option.