We had a fantastic stay at Deep Space Studio. It is in Brockley, South London, but very accessible by train and bus. Eryka was the perfect host -- very helpful re: good local places for food, drink, places to go, transit etc. She'd brought in bread, coffee, milk and so on. She even helped us with our washing (we'd been travelling for ten days before arriving in London). At the same time, she gave us plenty of space, so we had the privacy and relaxedness of being at home.
The flat is really nice, very comfortable. We were travelling wth our teenage son, everyone could stretch out very comfortably (ie lLOTS of room). We'll definitely go back to Deep Space if we can!