Located on a quiet street, this brand new hotel is less than 8 mins walk from lake, "old" and "French quarters, with Opera round the corner. The rooms have balcony for having your G&T, and there is a nice outdoor service area by the street. Choose this hotel if you don't need a swimming pool (there is so much to see in Hanoi you probably will not find time to use it anyway). I probably would pick this hotel again - cost is 1/2 of nearby Hilton. Travellers from the US would likely find the rooms too small but not an issue for Europeans. absolutely not
Conifer is very centrally located - literally around the corner from the Hanoi Opera house. My room, although street facing, was reasonably quiet. It was modern and comfortable, a good enough copy of a 5-star hotel room. Service was pleasant and helpful. Overall the hotel is well worth the money.