This is a nice apartment in a fantastic location. Of course, it is just a 2 bedroom 1 bathroom so if you are 7 people, like we were, it is going to feel a bit cramped. For 4 people it would be a roomy place.
There was construction when we stayed, on the back façade and the stairs. They have installed a nice elevator which is not yet operational. It is a small elevator, as big as space allows. Anyway it is just one floor to the apartment.
The apartment cannot have a/c as it opens to a street on the front and another street on the back and there is no place to install the outside machine or run the pipes to the roof. When we were there it was almost cold, anyway, and it was August. Also there seems to be a breeze all the time and this location seems to be cooler than the rest of Paris, being by the river. Anyway there can be a bit of noise from the street on weekends at night, and we had construction noise starting on monday at 8:30 am or so. Now the street is a cul-de-sac while the construction in Notre Dame will last, but there are still tourists coming to take some pictures of the Cathedral.
The restaurants on this street serve simple food like crepes and ice-cream and what we tasted was good. We took a to-go meal to the apartment from Huré next to the Haagen Dazs and it was quite good. For the fancier restaurants (if you like to eat snails, bunny, ducks and frogs:) you can walk to Saint Germain.