Apartment is located right in the historical center of Paris - walking distance to Louvre, Notre-Dame, Ponte Neuf, Latin Quarter, Musee d'Orsay, even Champs Elysees (if you 're willing to walk a lot which is IMHO a must in Paris), basically all major attractions. There are plenty of restaurants in the area with great food. Another upside - Chatelet metro station (major hub for subway, RER train) is right there so you can get to any part of Paris and make any side trips, such as Versailles really easy.
Host was great, ordering transportation from airport at our request and meeting us at the apartment, explaining ways around in Paris.
Apartment itself is really clean and modern, entrance is from a private patio with digital-locked doors.
I can say that next time we'll go to Paris we definitely will try to get the same place, it is a great value for the money and I would definitely recommend it to anybody.