We stayed here for a month and really enjoyed it. Really great location, close to Pigalle, Montmartre, cute cafes and resaturants and bakeries.
The apartment is very small, but has the essentials.
The main bed is very comfortable and works well for two people. The sleeping couch is not really a sleeping couch, it is more like a thin mattress that you fold to the floor. Ergo, the apartment works best for 1 person or 2 people who don't mind sleeping in the same bed.
Betty was very helpful and easy to communicate with (using g translate. She made us a second pair of keys which we greatly appreciated. Thank you Betty!