My stay with Julia was very pleasant. Julia is a very good host, the apartment is very clean and the room was more than satisfactory.
Prior to my arrival to London I had contacted Julia regarding an article that a local agency had posted for me. They needed a London address and Julia was very kind not only to accept my request that they will post it to her house, but also to personally go to the post office and sign for it after nobody was home when they first arrived. This was an extremely nice gesture and beyond expectations - when I arrived I had it waiting for me in the room.
I was mainly outside of the apartment during my two nights staying there and thus only met Julia when I arrived. I had full privacy and could come or go as I wished. The room itself is rather large and convenient with a comfortable bed and a TV set.
Although the Shepherd's Bush Market tube station is just a couple of minutes walk from the house, it's much more convenient to walk 7-8 minutes more to the much more central and well serviced Shepherd's Bush station. So basically if you don't mind walking around 10 minutes to get to the tube, the house is also very well connected to the rest of London by tube.
The only minor concern is that the neighborhood does not seem the most pleasant to walk around in during the night, but I never had any trouble. Bottom line, staying with Julia was very good value and I recommend it.