This hotel was great. It was very clean and comfortable and the staff were all lovely. I stayed here on 3 occassions during my trip, each time I came back to Hanoi. It's worth noting that some of the rooms don't have a window, so if this is important to you make sure the room description says "city view". I booked a room with no window on one of my stays and it was perfect. It's much more quiet. The communal spaces are very clean and tidy and the opportunity to do your own laundry was great (they also provide the washing tablets).
The hotel take a 500 vnd cash deposit when you check in. I had no issues with getting this back when i checked out each time. They also stored my bags for the day as my flight home wasn't until the evening. Definitely recommend staying here.