Really nice and big house in a very quiet area. It's plenty of space inside the house and the garden is superb. A great choice if you are travelling with kids.
Polly was always available through messages. When we arrived the door lock didn't work and she sent a locksmith in less than half an hour. While waiting, Joanne, her neighbour, was very kind and invited us to drink a tea.
The house is near a great park (Hampstead Heath) and is well communicated to the centre from Holloway Road station (by metro). Line 47 (bus) arrives directly to King Cross Station and Saint Pancras (not much slowlier route, less crowded than the metro and you can see the city from the bus). It takes about half an hour to get to the centre of London.
There are several supermarkets within a 15 minute walk: a local Sainsbury (about 3 minutes), Iceland and Waitrose (15 minute walk).