My wife, our daughter (8 years old) and I spent four days in the apartment in April 2022. Location is great, as Gare du Nord is just a few steps away. And despite the busy area, the apartment is very quiet. The apartment itself is exactly as described and as it looks on the photos. With two separate bedrooms it is ideal for families with children.
Keep in mind that it is not very luminous (being situated on the ground floor of a large building next to a small courtyard - cleverly shielded off by non-transparent foil on the windows) and has no terrace or balcony, so you need to go out to enjoy the good weather (you hopefully have).
Communication was excellent; very quick and helpful.
Overall, a very good experience and definitely recommended.