I stayed at Jenny and Justin's place with mu husband and daughter for a week and really enjoyed it.
It is a cute little flat, in a lovely neighborhood and everything you need is at walking distance. The access to city center and to the airport are very practical as the East Putney station is at 5 mns walking distance
There was a detailed welcome file at home that told us everthing we needed to know about the flat. They have been a wonderful host, respecting our privacy but being available when needed.
I would recommend this flat for a peaceful quite break in London.