I stayed at Christine's place for four nights and would go back if I visit London again!
The location is superb, right in the heart of SOHO area and most of the sights (e.g. Westminster Abbey, Hyde Park, British Museum, etc.) are within walking distance. The Piccadilly Circus tube station is literally 1min away, which is on the same line as the Heathrow Airport and King's cross train station, thus very convenient for traveling to other cities. There are numerous restaurants, cafes, pubs and shops in the neighborhood. You'll have to carry luggage up one floor of stairs but that seems to be common for historic buildings.
The apartment is full of stylish, interesting antique furnishings. The bedroom is not big but enough for solo traveler. The single bed is super comfortable with soft linens and natural light from the window. The bathroom is right next to the guest room.
Christine is very welcoming, caring and warm-hearted, which made a real difference to my stay. She prepared a good variety of fruits during the day as well as lovely breakfast. She provided a lot of interesting ideas on what to do in London, and it was a pity that I did not have time to do all of them. I totally enjoyed talking to her and felt the genuine friendship with her.