Julie's house was perfectly located for us (family of four adults), because we got to central London very quickly (Zone 2) and the station Queen's Park is also connected to the overground train to Watford Junction. This might be a helpful information for Harry Potter fans who plan to visit Warner Bros. Studios.
The information we got from Julie before our arrival was very detailed and helpful, Julie answered all questions very quickly and was just a great host.
The house itself is really beautiful with stylish furniture and everything you need for at least 5 people. We felt really comfortable from the first moment.