A wonderful stay in Paris! Perfect location, functional kitchen, and of course an incredible view. We were so happy with the place.
A couple considerations:
I would recommend earplugs if you are coming for a summer holiday. The windows do an excellent job of blocking the sound from the Hôtel de Ville fountains, but they had to be open when it was hot.
As someone else noted, the master bedroom connects the child's bedroom to the rest of the house.
Finally, if this is of interest, the WiFi is very very fast. My brother is a computer engineer so is always testing the speeds. So if you have a kid that is into video games or you need business-grade WiFi, then that is a plus!