This was our first stay in Paris. The apt appears to be a personal residence, but is a great walkable location at a good value. As mentioned by others the unit is a fifth floor walk up but is totally worth it for the view of the Eiffel Tower at night. I would give 2 small pieces of criticism after staying in two other air bnbs in Paris at similar price points:
1) The day of checkin after an 8 hour international flight checkin time was moved back 2 hours and we were unable to check in at the planned time and were informed as we landed in Paris. The good news is that the unit is right next to a City Locker and we were able to store our bags for ~30€ while we waited.
2) I would recommend that an easy accommodation improvement would be new bedding and towels (current are stiff and well worn). Other airbnbs that we stayed in had newer and cleaner linens
All in all for the price the unit is lovely.