My wife Heather and I stayed at Agathe's apartment for 5 nights and it was wonderful. It is definitely among the top 3 airbnbs we've been to. The views are amazing. You can see Notre Dame while taking a shower! The apartment was clean and had a lovely artistic touch. The location is amazing, you are 5 mins away from the St.Michel local train station which connects with Versailles, airports etc. Very convenient. Also you are minutes away from Notre Dame (Ile de la Cite) and there a plenty of restaurants, bakeries, supermarkets and a weekly markets around. Communication with Agathe was easy and quick. As Agathe points the views come at the price of having to hike 7 floors which is tough but one gets used to it.