Buses are great for getting around the city in airconditioned comfort (at least, in the newer models). Most major streets are accessed via a bus line and cheap at VND6,000 for a short trip. During rush hour, buses can actually be faster as they have an informal right of way on the streets: no-one will try and cut them off. Main bus stations are 23/9 Park (near Pham Ngu Lao area), Cho Lon, Mien Dong (to travel to the north) and Mien Tay (to travel to Mekong Delta).
Local insight: There is also a new hop-on hop-off bus (No.120) launched this year which is a good way to discover major attractions around the city