My mother and I had a very lovely stay at Claire's apartment. The house was clean and Claire was very kind to leave us a bottle of wine.
Flat location is directly next to a metro and RER stop, making it very convenient to get around. There is a washing machine in the kitchen. Quiet neighborhood, with great shopping near by. If you're looking for a neighborhood with more liveliness, cafes, restaurants, this probably isn't it. But, due to the central location and metro it was very easy to get to these places. Area is very safe. And walking distance from the Eiffel tower.
Only cons, the apartment wasn't ready when we showed up at agreed time, but we dropped off the stuff and it was ready when we got back. It also would be nice to have a few more towels.