My husband and I spent 4 nights in Paris at Marine's apartment. It was conveniently located near the Bastille. It was very easy to walk or catch the Metro from this location.
We did not have the opportunity to meet Marine, however she was always very quick to respond to emails. Her directions to the apartment and where to find keys, etc were excellent - she even provided photos, so we wouldn't have any trouble recognizing the place. She also left us a letter upon our arrival with recommendations on places to eat etc.
The apartment was very clean and neat, and had wi-fi with great reception.
All in all, we very much enjoyed our stay in Paris at Marine's apartment. I would highly recommend her place.