We had a wonderful stay there. The house is big, quiet and comfortable. It was a perfect place to stay for two families of four, each family having their own floor and own bathroom. It was really easy to get everything we needed from the local shops (all of them only a few minutes' walk from the house). There is a nice park at the end of the street as well.
The house was perfectly clean, with all the facilities and appliances we could hope for.
It is also really well-situated with the bus station right at the end of the street and the tube station a few bus stops from the house (one can even easily walk to Oval Station).
Finally Sabrina has been a really nice host, always quick at answering my questions. We also appreciated the complimentary toiletries we found in the bedrooms on arrival.
I definitely recommend this place for a family stay in London.