Cannot say enough good things about this apartment! The location is literally unbeatable. You are steps from tons of famous monuments, and not even a 2-minute walk from Hotel-de-Ville metro station, and maybe 4-5 minutes to Chatelet metro station, making anywhere you wish to visit in Paris easily accessible. The pictures do not do the view justice, it really is stunning. It's a stone's throw from Le Marais, Ile St Louis, Saint-Germain des Prés. Rive Gauche and Rive Droite are equidistant, so you can have the best of both worlds!
The apartment is situated right beside what many would say are the best banks of the Seine to sit on.
Location and views aside (monuments visible from apartment include but are not limited to: 1. Hotel de Ville 2. Notre Dame 3. Top 1/3 of Eiffel tower 4. Sacre Coeur 5. Pompidou Centre 6. Tour St Jacques 7. Eglise Saint-Jervais), the apartment itself is incredible. Keep in mind that there is no elevator and it is on the 6th floor in an old Parisian building, so be prepared to do stairs with suitcases. The apartment is bright and vibrant; it features a unique old stone floor, elegant furniture, and modern amenities with a fully equipped kitchen, combined washer/dryer machine, handheld showerhead with multiple levels, etc. Necessities like a (really good) hair dryer, iron+ironing board, are all there. Harmon Kardon bluetooth speakers, satellite TV, Nespresso. Ample closet space.
As for the host, Isabelle was very attentive and communicative, any questions I may have had were addressed promptly. Check in and check out were smooth with everything clear and found as described.
++++++Recommend!
PS: If you are concerned about disturbance related to Notre Dame - At least while I was there (June 2019), they were doing some repairs, but there was no significant noise. There was a little traffic rerouting going on, and the immediate area around Notre Dame is blocked off, but most of the restaurants/shops on Ile de la Cite are still open, and the street that the apartment is on is not affected, so you can still call an Uber right to the door.