Alexandra was very kind with us . We arrived in the morning (knowing the policy of afternoon entrance) and she agreed to have us leave the luggage before going to NY. But it appeared the flat could be made available very early and she made it. So thank you very much Alexandra!
Otherwise the flat is not within Manhattan but really 2 subway stops away making it very convenient as a base to visit NYC. Enough space inside for our 2 kids to relax after a day of visit. Definitively worth it.