I found Arianes room to be both spacious, clean and cosy, located very close to Gare de Lyon in a nice area. Even if I didn't meet Ariane in person she was quick to answer my messages, and her three flatmates were welcoming and kind. All in all: good value.
There are only two drawbacks that visitors should be aware of: If you're sensitive to sound you should bring earbuds for the night, as there's some noise coming from both the street and the bathroom, when used. The kitchen was usually messy because of the 4 people using it, which made it tricky to cook dinner and do the dishes. On the other hand: the bedroom, the bathroom and the living room were all nice and tidy.