What a great experience! The apartment is absolutely stunning and right across the bridge from Notre Dame. It was super easy to get to, with lots of restaurants and things to do close by.
There is also a City Locker a five-minute walk from the apartment, so on our last day, it was very convenient to drop our bags off and have one last amazing meal before our flight.
I will note that there is a bar right outside the apartment, and it was very loud between 12am - 2am. It was a couple nights before we turned on the fan and realized this drowns out the noise pretty well. Unless you have young children, I wouldn't let this deter you. We would definitely stay again!