Brice's place is as described. Located in the centre of the Goutte d'Or neighbourhood, the apartment is close to metro lines (Marcadet-Poissonniers and Barbès-Rochechouart stations) as well as Paris Gare du Nord. There are restaurants and convenience stores nearby. My go-to grocery/convenience store is Franprix (at the intersection of rue des Poissonniers and rue Ordener).
Sacré Cœur is within walking distance, which is definitely a plus!
Brice responded promptly to my messages. Check-in instructions were detailed and easy to follow. Brice's place was perfect for a solo traveller like me.