Gary's apartment is excellent, highly recommended!
It's location is excellent being situated within short walking distance (1-20 min varies) places such as the Luxembourg Gardens, shopping area of Saint-Germain-des-Pres, numerous restaurants/bars, street markets/supermarkets, laundromat, Raspail metro station, Port-Royal RER.B train station and Gare Montparnasse.
Check-in/check-out process is very simple. The apartment is very clean and very quiet. Communication with the host was very easy with quick replies.
The area is located in a residential neighborhood situated away from the loud touristy areas. It's great if you want to live like a local Parisian. Neighborhood is very safe and convenient.
You can see how locals shop for food at two local street markets (Bio Raspail and Boulevard Edgar Quinet) all within walking distance. Plenty of supermarkets in the area as well with Franprix, Monoprix, Carrefour, Auchan all within 5-15 minute walking distance.
Public transportation is excellent nearby with a direct connection from CDG to Port-Royal station on the RER.B train. Metro station Raspail on line 4 and Gare Montparnasse are also close within walking distance. Plenty of buses and taxi on street level running on Boulevard Raspail and Boulevard du Montparnasse can get you to the right bank tourist destinations (Louvre, Opera, Notre Dame, etc.)