We stayed in Stéphanie's house for almost an entire summer (7 weeks) as a family of 5. My children were 7, 4, and 1.5 at the time and the amount of space served us very well. The duplex layout and rare (for Paris) outdoor garden was wonderful. The children could go outside any time, and not to mention there are just so many parks within walking distance! The windows overlook the pedestrian cobblestone street as a perfect way to take in the city while perched in your own hideaway above. It's located in a friendly residential neighborhood, and we became regulars at Le Magnolia restaurant which is right outside the first entrance gate. Our daughter made friends with the family across the garden, and the local boulangeries were welcoming and helped me with my French :)
The house itself was clean and well kept, and the photos are accurate to how it looks and feels. The decor and furnishings were comfortable as well. Would definitely recommend this house to others for long (or shorter) stay! It's a great way to experience the real Paris but still be close enough to public transit to get to the city center.