Amazing time in London. I stayed at Josie's house during three months. Excellent location, in a safe, quite, well-connected neighbourhood, only 20-30 minuts from the city center by tube. Lots of shops, restaurants, supermarkets and other amenities around. Queen's Park, where your can go to run, read in the grass or exercise, is an 8-10 minute walk away.
The top room is large, comfortable and bright. You'll be able to use all the facilities of the house without any problem. Josie's attentiveness and sense of welcome is especially noteworthy. She helps you at all times and makes your experience in London more comfortable, pleasant and friendly. Your freedom and privacy will be absolutely respected.
I would say it is a really nice place to spend several weeks or months in this wonderful city.