Aline was easy and quick to communicate with.
The flat is cosy but there was plenty of space for my family and I (4 adults). The ground floor access worked out perfect for us. One very small thing, that can't be helped, is that you can hear the noise from the floor above.
There's everything you need nearby - metro stops, a bakery, a couple of small supermarkets, restaurants, cafes and shops. It's a great base to go and explore Paris.
It helps that there's a lot of sights within walking distance - the Louvre, the Tuileries, Palais Garnier, Galeries Lafayette, Sainte-Chapelle, Notre Dame (although closed for the next 5 years or so while the roof's being rebuilt), Musee de L'Orangerie and the Musee d' Orsay.
We had a pleasant stay at Michael's place and would definitely recommend it.