We stayed 6 nights at Isabelle's apartment, and it was the perfect choice for our trip. The location is great; walking distance to Notre Dame and St Michel and to Luxembourg gardens, La mouffetard, etc. the apartment is beautiful, comfortable, and had everything we needed. A big plus for me is the small balcony; we are breakfast out there every day. Also the best cheese shop in Paris is right outside your door and a lovely market on Tues/thurs/Sat mornings.