Perfect location; right near Gare Du Nord (we walked about 20 minutes with our luggage when we arrived - so easy to get to). Also very close to metro line 2 (3 minute walk). Loads of restaurants, fast food, cafes and bakeries within 3-5 minutes walk.
Accommodation is similar to your own hotel room - Emmanuelle and Olivier provided us with everything we needed and left us to ourselves for the rest of the time. Bedroom and personal bathroom makes it feel like your own space which is very nice. Hosts were very unobtrusive.
Excellent security with double gates and locked doors at all time - as well as a lock on the bedroom door (though we didn't use it).
Would definitely stay here again!