Mathilde's place was lovely! Mathilde was very easy to communicate/co-ordinate with, and the place was exactly as listed! Our group was seven people, the flat could probably sleep one more at a pinch on the living room couch. Brilliantly located for Montmartre as well as Gare Du Nord. Paris's metro system means that all of central paris is just about half an hour away. Thanks for a very good stay!
P.S. The fold out sofa bed is probably better for one person as opposed to two.