Le Marais is thriving. This flat is in the heart, yet it is quiet. I'd guess it's a 15 minute walk to Notre Dame and about 5 to the nearest Metro. The flat itself is one big room and a bathroom. The big room has a double bed with a retractable screen for privacy. The lounge/kitchen area is in the other part of the room, which has a bed-settee. Our family of 4 managed fine.