We were very pleased with our experience renting Fabrice's apartment. Communication was excellent with the host; he always responded quickly to any questions I had. Fabrice also made check in and check out was very easy and convenient with very detailed information.
The apartment has a wonderful view of almost everything in Paris -- Eiffel Tower, Sacré-Cœur, The Pantheon, the towers of Notre Dame, the dome of Les Invalides, La Defense, to name a few, can all be seen from the apartment. The view at night is particularly beautiful.
The apartment itself is nice but a small studio as is common in Paris (but it is exactly as shown in the photos). It is perfect for couples. For three, it might work if you're all comfortable with each other but it would be crowded for four I think (but doable if you have to). There kitchen has some basic supplies like coffee, sugar, etc. which you can use but of course should replace if you do. The apartment also has a number of guides for, and info, about, local sites. Free WiFi, washer, electric kettle, are also among the amenities provided.
The location is very convenient (and in my opinion quite under-rated) It's maybe three minutes walk to Place d'Italie metro which has three lines so you are within easy metro rides of anywhere in Paris. It's also very close to Rue de la Butte Aux Cailles and surrounded by many great places to eat.
Overall, we had a great time in our short stay at Fabrice's place, and I would recommend to anyone looking to experience a bit more of "real" Paris a bit outside the main tourist locales.