I was looking for a room for one night near Gare du Nord, as I had to take an early train the following morning. I contacted Nicolas at around 21:00 and he accepted that I arrive just 1 hour later, so I was very grateful to him! Although I stayed at his place less than 12 hours, I can say that the bed was very comfortable and the place is indeed just 5 minutes walking to Gare du Nord (even with a suitcase).