Vietnamese coffee any good?

I saw something on the Internet showing a metal filter used with
Vietnamese coffee which drips into a cup with condensed milk. Sounds
good, but is it? It also said it is good iced.

What does the filter do that a regular drip pot could not do if
someone used Vietnamese coffee beans to make coffee?

Also, once the process is done, do you stir the mixture or sip and
hope you get both flavors as you drink?

Lastly, would condensed milk be good with regular coffee instead of
cream and if so, why?

Thanks,
Caesar
.