We stayed in the apartment for 8 days in July - 2 adults and 2 kids (age 4 and 7). Booking and communication with Shahram & Rachael was very easy and they were most accomodating to our needs concerning early check-in.
The apartment is on a very quiet street, but very central, and it is easy to travel around London with tube and bus. There is a big shopping center just 10 minutes walking distance from the apartment.
I would highly recommend both the apartment and having Shahram & Rachael as hosts!