The prior communication was very good and check-in was smooth.
I met Pierre (Enguerran's frined) who was very nice and eager to help me learn French and told me a bit about the neighborhood =)
The location of the apartment was good too as it is at a walking distance from Gare du Nord (although as other reviews point out, you can hear/feel the metro underneath - still, not very disturbing however).
All-in-all, a very nice and clean apartment =)