This is an ideal apartment in the 3rd that gives you access to a multitude of boulangeries, restaurants, and other shops that will help you feel like a native for the length of your stay. You're in walking distance of Musee Picasso and Centre Pompidou. The nearest Metro stops - Temple and Republique - give you quick access to the rest of the city.
As for the apartment itself, the three bedrooms are interconnected, so if you're in the center one, you will have to go through one of the other two to access the kitchen and bathroom. As one of the bedroom was occupied by our children, it wasn't an issue for us. We had a slight problem checking in and a slight problem with the bathroom on the second day, but neither impacted our stay (and the bathroom issue was promptly addressed while we explored the city).
All in all, it was a wonderful week in one of the greatest cities in the world. A good part of the experience was due to this apartment.