This is a really good value hotel. We were staying 9 nights, so booked the family room to make sure we had space to be comfortable, and enjoyed the balcony from which we could people watch. Anh on the front desk is a marvel, and having worked in the travel industry for years I was really impressed with his commitment and dedication to service. He remembered every guest, their room number and any questions they had asked.
There are downsides- the rooms are noisy. The windows did very little to keep out any noise from the street, and Hanoi is a city that only seems to be quiet from about 2am to 5am.
While the room was clean, and towels changed everyday, room service did take my halfhearted attempts at tidying the bed as a sign that they didn't need to, and I don't believe the sheets were changed during our stay- but again, perhaps if I'd left them in a mess they might have been.
We also used the hotel to book a day trip to Halong Bay- a mid-range price and mid-range tour. It was with APT who are a reputable group, and the tour was good value, but you undoubtedly pay for what you get and luxury tours can definitely offer more.
Location is great- two minutes from the Cathedral square which is surrounded by lovely cafes, 5 minutes from the lake and fifteen minutes from the Mausoleum.