Great position, near the metro station or a 20 min walk to Louvre, Musee D'Orsay, Ile De La Cite.
However, when we arrived and opened the windows to change the air it was really hard to close them because the mechanism was broken. When we tried to contact the host to ask him how to fix this he simply did not respond. Some part of the box shower fall apart and the pictures don't give an idea of how extremely small the bathroom is. The apartment was not properly cleaned and the bed sheets had some hair on them; there was a lot of dust just behind the bed. During the weekend's evening we could hear the noise from the streets as if they were from the apartment next to us due to poor insulation. I think that such issues should be mentioned when booking the apartment.
Most importantly, the airbnb announce never mentions the fact that there is no elevator and to get to the apartment one has to walk up 5 floors of steep steps. This can become a real problem when going up with heavy luggage, especially for older people.
We did not expect a 5 star luxury service, but i believe that our experience in this apartment lacked some basics of hosting.