Arno is a FANTASTIC host! We loved the place and it worked quite well for our family of 5 (including 3 older teens). Super convenient to the major Metro lines. Arno helped us tremendously as we were getting scammed from a cab driver from Gare du Nord. The historic nature of this place also was cool alone. Comfortable beds, nice showers, great to have a washer/dryer in the place given our 2 week travels around Europe. Would gladly stay here again.
Only small drawback is on two of the evenings there was quite some loud music playing assuming from a nearby club. Was distracting to some of us in the flat, but others slept through it. Otherwise this is a perfect 10 place. Our favorite Air BnB we've stayed at so far!