My wife and I stayed here for a week with our two young children and my parents. The location is perfect - a two minute walk to Canada Water tube, in a lovely gated development with a fantastic communal garden for the kids. It's very quiet in the evening, and less than a 10 minute walk to two excellent pubs on the river (The Mayflower and Salt Quay). There's easy access to central London and walking distance down the Thames Path to the tourist sights, with a Sainsbury's local a couple of minutes away.
The house is large and easily slept four adults and two kids. Gourang was very responsive, helpful and friendly - both check-in and check-out were stress-free. A minor point that the pictures aren't entirely accurate - there's a different sofa, kitchen table, furnishings etc., but this doesn't detract from the pleasantness of the space, the excellent location, the cleanliness of the flat or the overall experience. I would certainly recommend this for families staying in London.