Staying with Marianne & Noel was a great experience. They are a very nice couple and their terraced house is situated in a well-located, pleasant neighbourhood.
The room is indeed tiny, but lovingly presented with a comfortable bed and a selection of interesting books, many of them on London. I also really liked the fresh fruit and flowers. The bathroom was just across the corridor, spotlessly clean and for my sole use. Everything in the house seemed neat and well-maintained, including the kitchen where good breakfast was provided every morning.
I can wholeheartedly recommend Marianne & Noel's place to any curious, respectful and independent traveller to London. Bring slippers to use throughout the house.