We had a great time at Marthe's place. Marthe and Aurelien are a very kind young couple who like to meet people from different parts of the world. Even that they certainly advertise the flat will be shared with them, the real thing is that the flat was for ourselves all day as they only go there in the nights (weekdays). We even had the chance to meet Marthe's sister who happened to be a very agreeable person and we spend part of the night talking with them and having some southern special wine while watching the Eiffel tower as well as the Triumph Arc from their beautiful terrace. The location is excellent, two minutes walk to the Argentina metro station. If we go there again surely we will stay there (if available). In short, we highly recommend this place.