My wife and I spent 7 days here in October and thoroughly enjoyed it. The location is convenient for accessing restaurants, the metro, and many major sites (Notre Dame, the Louvre, Musee D'Orsey, etc.) which are within a short walk or easy metro ride. The neighborhood was pleasant, and we regularly stopped at the next door patisserie and cafe for croissants, coffee, late drinks. There are lots of good markets and shopping opportunities nearby as well.
The apartment itself was clean and comfortable, but be aware it's on the fourth floor and there's no elevator. All the appliances were in good condition, and being able to do a load of laundry mid-week was invaluable.
Remy was very helpful throughout the stay. He provided clear directions for finding the place, and checking in with his colleague, Sebastien, was easy. We would absolutely stay at another one of his properties!