Cozy flat on the top floor. Lovely view of Paris from the window and the perfect amount of space for a single traveler who mainly returns to sleep/eat. There's a shower inside the room (rare for a top floor chambre de bonne with a shared toilette!). The floor was quiet and I never saw anyone else. There was a brief miscommunication during check-in, but the hosts quickly and kindly resolved it. The only issue I experienced during my stay was that the shower made the room smell a bit musty if the windows were left closed (not a huge issue in late July when the windows were open all day anyway), and I noticed a few ants.
Otherwise, the room was stocked with everything I could need and I was extremely happy with my stay. It was the perfect place.