This apartment is an outstanding choice, my favorite of all the places I've stayed over almost a dozen trips to Paris. I almost felt it could be a permanent home.
There's a pleasant bedroom, a sizable living/dining room that worked well for my on-the-road work, a really fully-equipped kitchen and a good shower. There are windows on three sides that allow for really good cross-ventilation. And really fast internet.
Sophie and Jean Leon live downstairs on the garden floor, and were quick to communicate about all questions and were quite helpful both in making arrangements and suggestions.
It's in the Clignancourt neighborhood, where I always stay: a lively family neighborhood with great food shopping nearby and lots of pleasant restaurants. You can probably get arguments from others, but Pain d'Antan, the boulangerie at the corner, is one of the best neighborhood bakeries in Paris.