We just spent a week at Sara's place in London. She is a great host, very responsive, helpful, and kind.
Location:
This area is safe, quiet, clean and family friendly. It is a very residential area. It is right on the park, it is lovely to walk in the park! You do have to travel a bit to get to most of the sight seeing attractions. Depending on what type of experience you are looking for Sara's flat may or may not be the most convenient place to stay.
Apartment:
The apartment/flat is exactly as pictured. Our expectations were met in this regard. The kitchen is very efficient and well stocked. The only down side to our experience was a strong, sulfurous, odor originating in the master bedroom/bathroom. It seems to be coming from the water heater, which is located in the room (closet). Since it is a basement apartment there is not as much air circulation and the odor never abated. We brought this up to Sara and she tried to help but couldn't.