We stayed at the Duquesne Eiffel in April and found it to be very nice and very convenient . It's 2 blocks from Invalides and 3 blocks from the Ecole Milataire Metro stop. There are quite a few nice restaurants and shops within a few blocks also. The rooms are typical european hotel rooms . but many of the rooms have a great view of the Eiffel Tower. They also have shuttle bus service from CDG.