The house of Stephane was very spacious. We slept there with three kids (ages 6, 8 and 10) and two adults. A perfect fit! The kids had a good time inside the house (table soccer!) and the house feels very welcoming. Unfortunately two of our kids got sick for a day so we were very happy with a big house to stay in instead of a small hotel room.
The citycentre is easy to get to by bus or subway. This takes about 20 minutes which was fine to us. We like the vibe of London and travelling by subway is a must. There are several supermarkets around the corner and a very nice park nearby. Next time we want to see more of Hackney itself because it looks like a cool neighbourhood.
To be short: great choice!