What a gem! This place epitomizes Parisian style. From the gorgeous courtyard to the cool, quirky decor, we spent the first part of our stay just exploring the interesting decor and architectural touches (they make very good use of all the space--while the flat is not large, it never felt cramped). It's worth noting that we are a family of 5 (with three large teenagers) and we still had ample room to relax and hang out (but note: the airflow in the space means that rooms/lofts are not closed off--you will all be able to hear each other at night).
The location is fantastic--lots of shops and restaurants nearby but very quiet at night (zero street noise) and always felt safe. It was easy to get buses and trains nearby to anywhere wee wanted to go in Paris, but also fun just to explore the local neighborhood. Checkin/check out was a breeze. Great apartment--highly recommend!