I had the fortune to find this gem for as a base for a project meeting with colleagues from all over Europe and the apartment is just perfect! The beds are comfortable, the kitchen is well-equipped, there are plenty of bathrooms, the Wifi works and the apartment has lots of power sockets (handy when you travel with Computer Scientists). After long working days we found some great restaurants in the neighbourhood or made a trip to the local 'Picard surgelés'. The foosball table was also a popular feature of the apartment to wind down after hours. Communicating with Marie was super easy and she was also quite flexible when we arrived a bit earlier.
Gare du Nord is a 12 min walk, the Sacré Coeur is about a 15 min walk so transportation and sightseeing-wise this place is super well situated. I will definitely keep this place on my list if I visit Paris again!