I've tried several Vietnamese restaurants since moving to Phoenix and this is the best if you're looking for a place that does a variety of dishes well. Vietnamese restaurants in more densely-Viet populated areas are known for specializing in specific items even though they may have a broader menu. Therefore, I waited until after a few visits to write a review.
Da Vang wins easily over Pho Thanh, whose menu, price, and location I find comparable. The pho broth is richer and less fatty. The bbq pork (thit nuong) on vermicelli and rice dishes is much more authentic. Their bo kho (beef stew) was very good and banh uot was also good. I spotted some crispy banh xeo on other tables and I might want to try that next.
I think this will be my go to Viet spot in Phoenix.