Maxime's place was wonderful for my mother and I's short trip to Paris. We arrived later than we thought we would and we were super tired from a long day but Maxime made sure to give us a call to help us get in (it was a self check in). There are a few flights of stairs to walk up with no elevator - which is very Parisian and Ok with us but be aware if you have difficulty with stairs.
It is a great area and a 9 min walk to Gare du Nord which has a direct 25 min train to CDG airport that you can take for cheaper than a cab.