Stop 1 - Frog Flower Garden
Stop 2 - Hanoi Post Office (Not available Friday afternoon, Saturday or Sunday)
Stop 4 - Military History Museum
Stop 5 - Imperial Citadel of Thang Long
Stop 6 - Quan Thanh Temple
Stop 7 - Tran Quoc Pagoda
Stop 8 - Ho Chi Minh Mausoleum
Stop 9 - Temple of Literature
Stop 11 - Hanoi Cathedral
Stop 12 - Vietnam Women's Museum
Stop 13 - Hanoi Opera House
Very good
It went to all the tourist destination and stop every 30 minutes. You will get the city map, earphone for multiple language and hat if you want to sit on the upper deck.
Note that the bus timing is only a guide and not accurate. The guide on the bus also may not know about restriction of the attraction you are visiting.