I really liked this place! It's nice and cozy. I stayed in the studio for two weeks in January during a work trip to Paris. Jean-David was really nice and always prompt in replying to my messages. I arrived at around 5pm and he was still at work, so his mother let me in. Her French isn't great but we understood each other well enough. Later in the evening Jean-David passed by to make sure I was all set and to tell me about the neighborhood. His English is very good and after an initial hesitation he was super helpful when I asked him to move some stuff around. There's lots of useful stuff: kick-ass washer/drier, vacuum cleaner, iron and ironing board, pots and cooking utensils, and a toaster oven (no microwave). Not much storing space because the closet is pretty small and some of Jean David's stuff is there, but there is space to hang some clothes, plus a couple of shelves (suitcases probably won't fit.) The heating is centralized and the apartment is very warm, even too warm, which is definitely better than not warm enough. I spent a good amount of time in the apartment and I can say that it's very quiet - almost no noise at all from the street - and also it's well furnished, clean and cozy so that I felt right at home. I was a bit skeptical about the location but it turned out to be perfect for me: there are two subway stations within walking distance, lots of Asian restaurants nearby which I loved, a nice cafe at the intersection, and an organic supermarket five to ten minutes away by foot on rue Tolbiac (there are also two regular supermarkets closer than that). The 14 metro line is very new and gets you to Chatelet fast. I'll definitely try and stay here again if I happen to pass by Paris one more time.