Nice place, nice location, but a few caveats: This may now be standard practice for airbnb in Paris, but I found it disconcerting that the "host" does not appear to be the owner and didn't know much about the property. On arrival you don't get a person meeting you at the place and showing you how stuff works, jnor is there a booklet telling you how to operate things in the flat. Plus you need to pick up the key at a business ten minutes away.
It took me online searches of obscure waterheater user guides to figure out how to get hot water when I arrived. (The "smart" hot water heater turns itself off between guests, apparently) Several appliances didn't work or work completely (two stove burners don't work, for instance, and the dishwasher never worked. Jean Francois did send someone to try to fix stuff, and was generally responsive, but since he wasn't familiar as an actual owner would be there was only so much he could actually do to help.
The kitchen apparently hasn't been cooked in by guests (no frying pan, few cooking utensils etc) Also I had to go out and buy dishwasher pods, laundry detergent pods, toilet paper and paper towels on arrival- not sure if this is standard now but I doubt it.
All in all its a nice place, and well-located. It seems to have been recently lived in by a nice family (lots of their stuff lying around but that didn't bother me, made it kind of homey) Bring some earplugs if you're sensitive as it's in a bar/ theater district and sometimes people got loud in the street late at night. Otherwise the building itself is quiet and public areas are kept clean.