My sister and I loved the room, which was on the second floor of the house. It had an own bathroom as well, which was very new and neat. The host was super friendly (and his wife too!). He knows a lot about London and gave good suggestions for areas to go to & busses and trains to catch. They were very relaxed so we really felt comfortable and welcome there.
The neigbourhoud was friendly and quiet, but just a little far from the centre; but hey; London is big so you'll always have to deal with long travel distances!
Highly recommended!