The location of the apartment is the absolutely perfect! It is VERY close to bus/Metro, Notre Dame, near Seine river and many other main attractions and beautiful places within the walking distance. Great number of restaurants and cafes around. In fact even the street where apartment is located is full of small restaurants, cafes, bars, ice-cream shop, tourist shops, bakeries, which is convenient on one hand but also makes this a very busy street during the day and night.
We were concerned about the noise in the beginning but it turned out to be OK. The apartment is on the top floor and with closed windows you do not hear much of the outside noise. We only kept it open one night as it was beautiful live music from the bar downstairs, but most of the time we kept it closed.
There were "little" things like fans were not prepared on the day we arrived ( as it was summer and AC was only on the second floor) and almost no toilet paper in the bathrooms.. but it was fixed the next day. As a plus, communication with the management and check-in and check-out process were very easy. Thank you for that.
The only problem for us was that eventhough the apartment itself is very cute, clean, with nice details and does have sleeping space for 6 people, the size of the place is very small for 6 people to move around. The toilet rooms ( separate from the bathroom) are VERY small, especially bigger person might feel very uncomfortable. Another point there were very steep small stairs to the second floor, we had to leave all our suitcases on the first floor as it would be difficult to take them to the upper bedroom.
Also there is a tiny elevator to the top floor in the building but to get to the elevator there is one flight of steep stairs.
Overall we had a pleasant stay with some inconveniences but I would say the location is unbeatable.