Lea-Catherine has a great apartment. It's extremely well appointed, with all the comforts you need whether you're in Paris for work or for vacation. It uses space very efficiently (it's a nice change from most lodging in paris not to feel cramped) and the kitchen is very well equipped. L-C's mother was very welcoming when moving in to the apartment, and Lea-Catherine was also very responsive and helpful in arranging for my arrival/departure.
Lea-Catherine has prepared an excellent guide to the neighborhood - and the apartment is very well situated. The metro, and several bus stops are only a few minutes' walk away and there are grocery stores, pharmacies, and even a health food store within less than 100 m. The neighborhood itself is very residential, but you're just a few minutes' walk from the Canal St Martin and Place de la Republique/Gare de l'Est/Belleville. I would definitely recommend Lea-Catherine's place!