This apartment is great. I stayed for six days for a business trip and thoroughly enjoyed it. It's not huge, so you wouldn't want to book it for more than two people, but for one or two people it is near perfect. The location is *outstanding* with easy access to the metro, Gare du Nord, and the restaurants within a 5 minute walk are really good. I don't have anything negative to say about it, I would definitely book this again.
And Alexandre was a pleasure to deal with, even though I am the typical stupid American who speaks no French.