The flat is in a nice building in a good location close to Marble Arch and Hyde Park, and public transportation. Communication with the host was very good. They responded quickly and addressed our concerns as best they could. We had an issue with access to the outer gate and building door, and only had a key to the flat itself. This meant that we had to depend on a call to the concierge (which did not always work) or the kindness of neighbors to let us into the building. Our understanding is that the host was trying to get the key fob for us, but was unable to during our stay. Hopefully this issue is fixed for future guests.