Very nice stay in great location. We got in just before midnight with tired kids but no problem meeting up. 2 fold-out coaches plus queen-size bed fit us comfortably. Kitchen a bit small but well-equipped & fine for eating, place is on 1st floor easy to get to (plus lift if anyone cares). Shower a bit small but good hot water. Some nice art books, plus guides for tourists were quite helpful.
Large & small Carrefour supermarkets within 1 block plus a couple late-night markets. #42 bus downstairs heads straight to Gare du Nord, but in other direction Galleries Lafayette/Opera/Madeleine/Arc de Triomphe/Champs d'Elyssees/Eiffel Tower. Easy walk up to Sacre Coeur/trendy parts of Montmartre, to Rue La Fayette & down to Rue Monmartre/Richelieu-Drouot passage section heading down to St. Denis. Nice trendy pub w 3€ half-liters next to Notre Dame de Lorette.
We could have left our stuff there the last day but it was more convenient to leave at Gare du Nord (about 8 bus stops away) to head to the airport.