The location can not be beat. We found most of the city sites to be close enough to walk with two children (aged 9 and 6). Major metro stops are also very close. One street over is Rue Montorgueil which is a pedestrian road filled with small bread, cheese, fruit, seafood shops, and restaurants. Several grocery stores were conveniently close as well. On Sundays the street in front of the apartment is turned into a farmer's market.
We stayed in the apartment shortly after the most recent renovations (3/2014). The new bathroom is fantastic and includes a tub/shower combo (standup showers still seem rare in France and we were pleased to find one here), a towel warmer, and the other standard amenities.
Checkin was very easy. We were greeted by an English-speaking representative and walked through the details of the apartment.
The second bedroom is fairly small, but we were able to have both of our kids in there - one on a twin bed, one in a pull out trundle. There is also a pull out sofa downstairs which could easily have suited the second child, or another couple.
One note is that it is a very open layout so privacy is a bit restricted. The large bed is on a loft overlooking the living space so couples in the main bedroom and pullout couch will be fairly close together without doors. The one bathroom is just past the main bedroom so guests sleeping on the pullout will be walking through the main bedroom to use the bathroom. The small bedroom does have a door.
The apartment management was very easy to work with and communicative throughout the process. All the agreements were clear, as were the steps in the process from initial deposit through final checkout. They also included a handy guide to all of the appliances in the apartment, and a some helpful tips for the area (locations of groceries, restaurants, etc.).