I stayed in the smaller room for a month. Everything was tidy and I especially loved Maz' hospitality. She was so quick at responding to messages even though she was not in London for half of my stay. She always made sure that everything is perfectly arranged for her guests. At the end I had to extend my stay for a night which was no problem at all. I really appreciated her spontaneity.
Just be aware that the other room is rented out sometimes so you might share a flat with strangers (but in my case they were all very lovely!).