Stayed here as a party of three. Plenty of room for everyone.
Pros
Good location (except for one street near the chateau rouge metro station that felt a bit dubious)
Metro station only 5 minute and only 2 stops from main train station Gard du Nord.
Nice and warm in the apartment when it was freezing outside.
Kitchen has all the amenities needed.
Host very responsive and let us leave our luggage up to 3pm on check out day.
Small supermarket next door
Lots of cafes and restaurants on same street and locally. Excellent vegetarian restaurant a few doors down from the apartment.
Excellent value for money as easy to travel around Paris via metro or Uber.
Cons
Due to a steep set of stairs to the only bathroom and downstairs living area, would not really be suitable for people with mobility issues or small children.
Overall excellent stay would recommend apartment and host.