This place was great for my 3 days in Paris (although I spent almost no time there other than sleeping). It is bigger than I was expecting for a European studio, and the bed was big and comfortable.
The location is perfect. Very close the Saint-Michel Notre-Dame metro stop, so getting their from CDG was very easy. A couple blocks from the river, a couple blocks from a bunch of bars, restaurants, and street food, but still on a very quiet street. Very easy walk to Notre Dame, Louvre, Musee d'Orsay, Tulleries, and all the sights in that area.
Melissa was great. Very communicative and flexible, and gave some great restaurant recommendations.