The house is big and it has a huge potential, especially for its location and dimensions. In our opinion the house may be cleaner in the kitchen (sink, rusted cutlery, kitchen platform), in the bathroom (hairs everywhere, shower encrusted of limestone and its drain water clogged) and there is lot of dust in general everywhere.
Infact during a night we have found a mouse in our room. Luckily we haven't seen it anymore, but we had to solve the problem by ourself spending an entirely morning looking for mousetraps.
However, beyond that, the house is really in the center of Paris, close to the underground and in a good district.