The Cinnamon Cathedral Hotel is centrally located, near many restaurants and a short walk to Hoàn Kiếm Lake and the night life in Beer Street, but far enough away so that it is very quiet (save for the Cathedral bells).
Helpfully it was also close to an excellent pho restaurant, Phở 10 Lý Quốc Sư and a telecom where you can buy a cheap SIM.
The staff are very friendly and extremely helpful.
My room was upgraded on the second day for free.
The staff organised a motorbike tour and a walking tour for me at short notice (both of which were excellent). And they were also were helpful when I was running late for my flight out of Hanoi.
When I return to Hanoi I will definitely stay at the Cinnamon Cathedral Hotel.
Mark Fisher from Australia
Stayed Mar 2017 - Cinnamon Cathedral Hotel