Location:you need to take a funicla to get there,but there will be a different experience of staying in the center.you can take a walk to Notre-Dame in the quiet morning!
Flat:it 's on the 2nd floor(1eme etage), no elevator.room has large dining+living(with sofa bed)+kitchen and a room with a bed.shower and toilet are separated.rooms are clean,well equipped,decorated lovely,and have lots of informations in detail written by owner.
I strongly recommend people who is
an active kind of person, loves being quiet and wants to stay like locals!!