I spent 6 nights in Eleonora's lovely apartment.
The apartment, whose location is superb, is cozy, comfortable, and was impeccably clean and tidy. The check-in was super-easy, and, in addition, I was greeted with a Cézanne-like small platter of fruit :)
The bed, which, as the pictures show, is loft-style, was extremely comfortable. The kitchen was well-equipped, and more than enough for what I needed. The shower had boiling hot water 24h. However, it is rather tiny, which is the only real drawback in the apartment. If you're a big guy (or girl), it might get a bit narrow there... For the chilly nights, the heating worked extremely well.
Eleonora was always responsive. Before my arrival she sent me accurate and detailed directions as to how to get there.
Overall, this is exactly the kind of place you want to get when you use Airbnb. For single travelers in Paris, I highly recommend it.