Not sure the accurate operating hours. As the website says that they are open at 0600, I went there for my breakfast but it was closed (It wasn't their off day !) I am not a picky eater but I found this beef pho very...unique and would love to try again. The first sip of the broth brought me much fragrance of ginger or lemon glass. I think it is my first time to take that kind of broth for beef Pho. Right next to the pho section, an auntie is sitting to sell deep fried dough sticks. Although I didn't try them, you might want to :) Beef pho and the sticks look a good harmony. They are located in the heart of Hanoi Old Quarter. You should try. It is pity that they have a siesta time. Hopefully they will be open all day long.More