Good spot. It is a short walk to the Gambetta metro station, and we really liked the area. Ignore anyone who says it's dangerous - it is absolutely fine, and very interesting, with an excellent Monoprix supermarket nearby for self-caterers, plus a lot of smaller food shops and restaurants.
Marie was a responsive and accommodating host.
This seems to be Marie's own flat, as her stuff was in there, but that was fine. The kitchen is very small, but worked well. For the price in Paris it is a good deal.
We had some problems with noise from neighbours - but the other places I've stayed in Paris were also noisy. Earplugs are good! This is just what you get with population-dense cities, I think.