The apartment - beautifully decorated, traditional features with cool modern take. Enough space for four adults and a toddler to be comfortable. Well equipped kitchen and everything you need.
Hosts - Super responsive, friendly and accommodating.
Building - Gorgeous building that makes you feel like a Parisian. Very peaceful as set back from the road and art studios below. Lift takes you up most of the way but you then climb some windy stairs to the last floor. We didn't find this much of a hassle as we had a light stroller which is essential for the Paris metro.
Neighbourhood - Couldn't be better. Short walk to Gare du Nord. Surrounded by metro stations. Great restaurants, cafés and live venues in all directions, many within less than 5 minutes walk. A supermarket too. 20 mins walk away, you have the very trendy Canal St Martin area and you're only a 20 min walk from the shopping district around Galeries Lafayette.
I'd definitely return to the apartment and the area - loved it!