Ironic that Vietnam is becoming an expat haven for retirees from around the world.
I actually visited Vietnam in October, myself (Hanoi and Ha Long bay) and was amazed at what a beautiful country it is, how nice the people were and how CHEAP everything is. Dinners for 4 of us with bottles of beer and water would be $12 total. You can get spoiled in a hurry with that cost of living.