The apartment has two rooms, one where's a double bed and the kitchen and another one with two single beds. I stay 4 nights with my parents and family (all grownups ) and it was perfect just to sleep and have a quick meal. It's suited in a centrical place, the metro and RER are just two blocks away, and four or five blocks away from Notre-Dame.
Nina is a great hostess, she help us with everything we needed.
I would definetly recomend it!