A big thank you to Dominique and Betty, who have been most helpful during our stay! I was late for appointed check-in time for about 30 min, and Betty was so kind to wait for me to come and helped with the hassle-less check-in! Since our departure flight was in the afternoon, we communicated with Dominique and he said it would be fine for us to check out by 2 pm. The apartment's location is super convenient, 5 min walk from gare du nord. Environment is very quiet, no noise at night so we all have had very sweet and sound sleep :)