Dominique and Sylvain are very kind and lovely people, the communication with them went smoothly. The room itself is small, but has a great space heater (Parisian mansards are usually very cold in autumn and winter, so that's very important), there's some space to cook basic meals and make some tea, also a desk with a lamp, which is much appreciated. As I think with every mansard, this is a space strictly for one person with little luggage, prepared to climb a rather steep spiral staircase to the last floor. The neighbours are rather quiet and the location is incredibly convenient specifically for me: Bastille opera is 5min away; all the great falafel places at rue Rosier nearby; place des Vosges, where Victor Hugo used to live, is just around the corner. I'd recommend this place to any traveller on a budget, who wants to make the best of their trip to the very expensive city of Paris, while being somewhat interested in the city's history, because that should be the main reason for choosing a place to live in central Paris.