The Airbnb is super cute, nice and spacious - there were three of us and we felt the size was more than enough. The place is centrally located and only a minutes walk from a convenient metro line too (goes direct to Gare du Nord on line 4 and line 6 goes direct to heaps of excellent spots across Paris).
The pictures don't do the place justice - it felt like a very quintessentially french apartment and the private courtyard it's located in was super cute. I would definitely try to stay here again when I come back to Paris, especially for the price.