I took the taxi in Saigon when I was going somewhere with Charles, but I cycled otherwise. Bicycling in Saigon was much better. I needed my iPhone with GPS to navigate around but the city is quite manageable and small enough.
And the traffic in Saigon is exciting. Definitely like a video game. You have to anticipate the potential moves of lots of motor scooters, and you have to throw yourself into oncoming traffic if you need to make a left turn. I feel quite accomplished for surviving it and actually getting used to it. Now I think I could manage cycling in any city in the world.