You can't really beat the location of Soline's apartment. It IS in the center of Paris, walking distance to many touristic attractions, yet close to public transportations (buses, subways, etc) that can take you to everywhere else in Paris. We pretty much walked to most of attractions and museums. There are lots of nice restaurants and shops downstairs and in the neighborhood.
We like to open the windows when we get home, it felt nice to immerse in the Paris's lifestyle. And the apartment gets really quite with the windows closed. Unfortunately the last 2 days of our stay got really hot. We had to leave the windows open at night, which became really noisy.
The apartment works well for our family of 4 with 2 big beds, and still have plenty of room in dining and sitting areas.