My two adult children (21, 18) and I had a pleasant week's stay at Nadia's apartment. The apartment is as pictured here: large master bedroom, two single beds in the smaller bedroom and a spacious living room / kitchen. The kitchen is well equipped, the bathroom has a bathtub and the beds are comfortable. Nadia lives in the same building and can be easily reached if need be, but as everything was ok, we didn't need to bother her.
Shephard's Bush in an interesting combination of old and new with the fancy Westfield Mall right next to the apartment. Holland Park and Notting Hill are within walking distance, and the tube and bus stations are only a couple minutes way, so the apartment is well connected.