What an excellent location for us! The Russell Square underground station is literally across the street. We only needed access to Zone 1 for all of our tourist-y activities (museums, shows, shopping), and much was within walking distance. The place was perfect for two couples, but two or three guests would also be comfortable. The kitchen is well-equipped, the building is quiet, the big windows are cheerful, and furniture and beds are comfortable. The only limitation is hot water: the tank is small and needs to be heated for each shower or bath. (But we were Americans who are used to long, hot showers and so a bit spoiled.) I highly recommend Mark's place.