I had a lovely stay at Catherine's apartment. Location-wise, you're right next to the Pigalle metro station, meaning that you can be almost anywhere in Paris in less than 30min. You're also right next to the beautiful neighborhood of Montmartre and the Sacré-Cœur Basilica. The room is quite big, quiet, and very illuminated.
Catherine truly embodies the AirBnB spirit. It almost feels like you're visiting a relative more than just staying in an AirBnB. She's very sweet and talkative, but will also respect your space if you just feel like being in your room. She will also give you great Parisian tips/advice, if requested :)