Max and Billie were very responsive from the first day. As everyone mentioned, this apartment is on the top floor and the building does not have a lift, so you will be walking up 5-6 flights of stairs.
However, the cleanliness and location were great. My fiancee and I chose this location because it is quieter at night, but still very easy to get to all the major sights. It is only about a 2 minute walk from the Notting Hill Gate Station and it is a very safe neighborhood. Upon arriving, the apartment had shampoo/soap in the shower, fresh towels and linens, and a box of English breakfast tea in the cabinet. It was a wonderful stay and I would book with Max and Billie again.