I recommend Lauren’s place. It is really close to public transportation ( metro is just 2’ far and right below the apartment there is the bus stop) and to the center. The apartment was clean and the communication with both Lauren and the owner was easy and fast. They also helped us with extra information before our arrival.
We were 5 people (2kids) and, despite of the fact that the apartment fitted all of us, it is quite small. In any case we were outside all day so it was not a problem.
We would come back if we come to London.