I loved the location, it is in the heart of everything. The area is also very quiet at night, we felt safe returning late at night and were able to sleep without being bothered by noise. The heating system also works wonderfully, keeping the apartment nice and warm.
I strongly recommend this apartment to anyone coming to Paris, just be ware that one of the bedrooms has to single beds and the other one has a queen size bed, but it is only for children due to having a very low ceiling. Loved Le Marais and Chantal's apartment!!!!