I had the most wonderful 2-week stay at Nicolas's apartment. It's centrally located; a metro stop is just 500ft away. There's a delicious bakery and bistro across the street which is excellent for grabbing everything from an espresso to a Croque Monsieur. The bus stop is also right in front of the building with easy access to Gare du Nord, etc. The apartment is clean and has beautiful lighting, the shower pressure is *PERFECT*, the community is kind and welcoming, and the area is super safe.
As a host, Nicolas is very attentive, easily accessible, and even leaves a booklet of local haunts in the area to go to for shopping, coffee, groceries, cheese, etc.
One thing to be mindful of: the stairs in the building are quite steep, so it can be a bit tricky with lots of luggage, but worth the work once you get into the apartment.
Overall 10/10. I would absolutely recommend staying here whether traveling alone or as a couple.