Hi Richard,
We were in VN for a short period of time last year just for a visit and never had any consideration of retiring there. We were pleasantly surprised to see how the country has changed so much although it still had a lot to catch up with the rest of the world.
It is true what you said about coming there with no expectations. However, I'd like to prepare myself before I embark on some unknown territory . So this is a preliminary research to see what options the country has to offer. We will definitely have to come over there and stay for a while to see whether Danang or Vung Tau suits our needs or whether we like it before committing to stay on a long term basis.