This is my fifth stay in Paris, and of those stays, Floy's apartment was in the best location. It is right next to Nation and therefore convenient to major train lines. In walking distance, there are three grocery stores, several excellent patisseries, cafes, sushi restaurants, a shopping center---all you could ever want.
Floy's apartment is also the largest and best value I've found in Paris. Most Parisian apartments in my price range are small studios, although they do great things with the space. This apartment is a proper one bedroom.
The apartment is very homey, with all kinds of personal touches and possessions. This was a unique experience, as most AirBNB and hotel rentals feel extremely sterile.