My boyfriend and I spent a week in London and, as it was first time visit for him, we wanted accomodation as central as possible so we can get everywhere quickly. Steve and Lilly's house is perfectly located, minutes of walking distance from Tube and buses.
The room itself is very cute and, although rather smallish, we did not find that to be a problem. We found it cosy. Bed was very comfortable, which was very important to us after walking around most of the day.
As for Lilly and Steve, they were perfect hosts in every sense. Initial communication was very easy, they were helpful and easy going.