Above all, this place is exceptionally clean, for me that's the most important thing in an Airbnb. The bed was super confortable and the AC was a lifesaver during the unseasonable warmth they were having during our stay.
As others have said, the location is colorful, kind of line Barcelona's Bushwick. And it's central to all the cool restaurants and bars (import export CAM!).
I'm a large man and never felt uncomfortable, however, I wouldn't feel comfortable with my little sister staying here alone, but that's nothing that Laurent and Audrey can control. Just be aware, as you always should when traveling and you'll be fine. I would recommend this place to anyone looking to be in the thick of the coolest neighborhoods in Paris!!