For large groups this could be a great way to visit London in a cost effective way. There are bus stops and underground stations within walking distance. The apartment provides a large space and 3 nice, large bathrooms.
It is far away from the center of the city and took us about 30-35 min each day to get into the city and then back home. During our visit it was quite hot, which required the windows to be open and the street was extremely loud until 2am. So bring ear plugs or your travels fans.