I stayed at Daniele's apartment during a 2-week research stay in Paris and was quite happy with my experience. The studio is small, but impeccably clean and well- (and efficiently!) appointed with Muji furnishings. Daniele has thought of all the little details to make it comfortable and practical! I found the apartment incredibly well located for public transport- steps from the Strasbourg-St-Denis metro which gives you access to the M4, M8, and M9 lines. The neighborhood around Porte St Denis is lively so you're surrounded by food at all price ranges and food from around the world (Turkey, Kurdistan, Syria, etc), cool bars (Jeanette, e.g.), cafés, as well as two grocery stores (Carrefour and Monoprix) and a few nice "specialty" food stores where you can get your French delicacies. But it's also a short (10-15 min) walk to the Centre Pompidou/Beaubourg area or shopping at Les Halles, or to the Canal St-Martin. Daniele lives nearby and acted as an incredibly helpful and gracious host, giving me all sorts of useful tips for my stay in Paris. I especially recommend this place for a solo traveler or a young couple.