The location of this flat is wonderful! We were so close to so many restaurants and shops, the Eiffel Tower is within walking distance, and the Louvre is within walking distance or a short train ride away.
I would not recommend this flat for more than two travelers. There is ample sleeping space, but there wouldn't be a lot of space for belongings and moving around. There are also some pretty big stains on the fold out couch, and we couldn't find sheets for it. An extra blanket was provided, though. We also had a hard time with the shower. The water was scalding hot, and made showering a less than pleasant experience. Maybe we were doing something wrong, but we couldn't figure it out.
Our stay was enjoyable enough, but we wouldn't stay here again.