I came to Paris for a few days with my wife and two children (ages 3 and almost 1) and had a lovely stay here. The apartment had enough room for everyone and our son loved staying in the kids' room here! The location is perfect for a family (park across the street, multiple nearby transit options, can walk to eiffel tower in under 30 min, plenty of restaurants and grocery stores close by). As long as you don't come during the peak of a heat wave (33+), the temperature can be manageable even if it is warm (it was nearly 30c when we were staying, but fans and opening windows during cool hours made it so we could still rest).
Host was communicative and helpful. Price was also a good value. Overall I'd highly recommend this spot for any couples with young children (families of 3-4) if you come when there is availability!