The apartment is in a strategic location, at walking distance from several attractions (Picasso Museum, Notre Dame, Centre Pompidou, etc), and in an amazing neigborhood. Lots of restaurant and bars nearby, and a supermarket literally next door.
The house and the apartment themselves are very well kept, tidy and comfortable. Lucie and Pierre were perfect hosts, and have everything in the apartment one should need during a stay, there.
I strongly reccommend to stay at their apartment during a short break, or a long stay in Paris.