The most lovely neighborhood in paris, close to the city centre. So if you rent for location, that's perfect.
But be aware that it is just a mini-bed behind a sofa in the kitchen, and there are many many rules you have to respect (e.g. only open your suitcases in a specific place, just use a specific plug for your electronics, do not touch soap and shampoo in the shower (!), only turn a tiny light after 11...). that the bathroom is tiny and you have to climb 4 floors of old, wood stairs (as in many places in paris, but it might be worriesome).
Beside that, Marie was nice and flexible with keeping my suitcase until 6 the check out day, she provided a lot of information for this amazing part of paris.