For me, the best deluxe hotel in Hanoi is the APRICOT for several reasons ; it is the ONLY one on Lake Hoan Kiem; it belongs to the owners of the Apricot Painting Gallery, the most famous in Vietnam, so it exhibits over 250 works of art in its lobby and corridors; it has a roof-top pool with a greae view of the city and, for it extreme quality, it is not expensive.
On another side the Metropole is a rip-off : very small lower-priced rooms, everything is atrociously expensive ( 80 000 VND - 3$ for a beer and over 350$ for a room big like a closet) and, worse, when they KNOW that people arrive mostly by plane early in the morning (generally 6:30), they charge you double if you check in before noon ; the 350$ room becomes 700 !!! They claim that they have to keep your room empty the day before to secure it when you arrive, which is a big lie because they are never full !!!!