Great location and excellent communication from the hosts and their associates. We took advantage of the driver they offered, Mr. Paul, to bring us from and to the airport. Their assistant, Reiko, greeted us at the apartment and helped us check-in early. She gave us a tour of the unit and instructions. Again, excellent communication, clean apartment stocked with soap, towels, and bottled water.
A few things to be aware of that may or may not impact your stay in this specific apartment. There is a school playground outside the window. With no air conditioning in the apt it is helpful to have the window open. There will be noise of children playing early in the morning on weekdays. This wasn't a problem for us since we were up early and out exploring Paris.
We did have an issue with noise at night on the Friday night of our stay. Someone in a nearby apt was playing very loud music until 11:30pm. We contacted Rumi and she offered to call the police for noise complaint. (We had a small baby with us and had to get him to sleep early).
Final challenge was with the 'child friendly' aspect of the apt. The bed lowers down from the ceiling and hangs about 4 feet above the floor. We could not safely sleep with our baby in the bed as we had planned. There was a futon in the apt where my wife and baby slept. I believe they also offer a crib if requested.
If you do not travel with children and plan to be up early and to bed late then this apt is great! Great location and excellent communication!