We stayed there for 5 days as a family with two teenagers and the place was just perfect.
The location of the apartment is amazing. You look at the Seine and Sainte-Chapelle from the tiny balconies while having a coffee. This is just Paris. Louvre and Notre Dame are in walking distance as well as a bakery, supermarket, and of course many cafes and restaurants as well as the metro. The apartment offers a spacious living room with a well-equipped kitchen and three sleeping rooms. Because it is on the 6th floor (luckily there is a tiny elevator) the rooms are very bright and sunny. Check-in and the overall communication was very easy going and all my requests were answered really quickly and in a very helpful way. I definitely can recommend this apartment for a city trip to Paris.