The Airbnb has a fantastic location -- you could not choose better. Incredibly central and less than a 5-minute walk to the tube station. We also found the buses very convenient, and the stops were just across the road from the Airbnb. It is a 5 minute walk to Hyde Park, as well. The Airbnb is on a cul-de-sac, so it is very quiet, which feels like a treat in London.
The hosts are very responsive. We were particularly impressed by Matteo, who went above and beyond to deliver a level of service for us.
As two small notes: 1) the hosts were having some issues with those they had subcontracted for cleaning when we stayed, but this should be fixed for future guests. 2) When we booked this place, it was advertised as having a sofa bed. We found, however, that it was not fit for an adult, but would perhaps work for a small child.