I had a fabulous stay in the garden house.
It's located right behind the main house in the garden (as the name says) in a quiet residential area, but still close to public transport, shops, nice bars and the Thames river. It was a bit early in the year and exceptionally cold (the house has good heating and even a fireplace), but the area must be lovely in spring and summer as it has many parks and you can walk along the river. Connection to the city center is also fast and easy.
Edwin and Marloes are such great hosts - they took me in super spontaneously after the airbnb I booked originally got cancelled just one hour before my arrival, they had a lots of tips for the area and were helpful in every way.
I can highly recommend this airbnb and will try to come back when the snow will be gone ;-)