I stayed for 3 months while working in Paris.
Location: The location is truly exceptional, letting you experience the full joy of living in a vibrant walkable city. The apartment is very close to three different metro lines (6,12,10) and a Velib bike share station. There is everything you need in a few block of the apartment: multiple grocery stores, pharmacies, banks, cafes, restaurants, cheese mongers, butcher, bakery.
Apartment: The pictures are very accurate. The space is simple, but functional. The kitchen is fully stocked (including appliances), although it has a very odd collection of pots and pans. It was a little odd that there was not a dresser or cabinet for clothes in the apartment (I ended up keeping my closes in the bathroom cabinets). While the apartment is smoke free, at least one of the neighbors is a smoker and I would frequently smell cigarettes smoke drifting in to the apartment.
Host: Sophie spoke great English and was pretty prompt replaying to messages. She was flexible in accommodating my early flight home and checking my out the night before.