No need to call in, expeditious as hell, and they serve beer on ice, just like Vietnam, without asking. With its large space and large staff, it is one of the better Vietnamese restaurants in SGV, and makes Golden whatever look like cheap tin.
Not sure if best but Vietnam Restaurant in San Gabriel has one that I enjoyed. Recommended to call ahead 30-45 min. Great place to enjoy catfish and seven course beef, not to mention same fried eggroll as golden deli.