We stayed with our two children, who were in the 8-13 age range. We had a very hard time finding a place where our children could each have their own bedrooms until we found this one. (There are three real bedrooms, not makeshift beds as in some other listings: A real plus for kids who sleep much better on their own.) It was easy for us to walk to public transportation or to the Eiffel tower.* A grocery store, bakery, and nice restaurants are also all within walking distance. (Our first night we had some excellent crepes and discovered that our daughter doesn't much like crepes!) There's a small lift/elevator, useful for tired children and handling luggage. The apartment had everything we were looking for, although of course family needs vary. We did not have a lot of interactions with the host because it was not necessary. When we did have some initial trouble getting in, they were responsive and made sure things were all right. We found the apartment to be an ideal "headquarters" for our Paris trip and would stay there again if we got the chance.
*A tip for folks planning to go to lots of museums--the musee du quai Branly Jacques-Chirac is a short walk away from the Eiffel tower and sells museum passes without as much of a wait as you would likely get at the Louvre or one of the other more central museums; the pass allows access to a wide variety of museums and attractions in Paris, and easily pays for itself. We had not planned to visit the Branly itself but found it fascinating and well worth a visit. A very pleasant surprise!