I have visited Paris with my wife and two kids and found the apartment to be perfect.
First, the location is very well suited for families since its in a quite area and away from pubs and night noises, there are two metro stations nearby which is great in addition to a grocery store and restaurants and cafes within few steps outside.
The apartment is spacious with huge windows providing plenty of natural lighting, Its clean with plenty of books to read.
Amenity wise, the apartment is fully equipped with everything you might need, and every item is in a perfect situation.
Maria was a great host, she have always been swift with her communication and responded to every request we had, she gave us a proper tour once we've arrived and continued to stay in touch till our departure.
Two minor comments from my side:
1- there were no twin beds as shown in one of the pictures, so i guess you have to request it before you arrive.
2- the wooden floor is quite squeaky, so you have to be mindful while walking if you have any family member who sleeps lightly, in addition to being mindful to those who live in the apartment below.
Overall, staying at this apartment was a great pleasure, we have really enjoyed Paris thanks to Maria for making our stay such a joyful one.