Yes! Yummi Banh Mi truck is awesome and a welcomed addition to the charlotte food truck scene. I recommend trying the lemongrass pork on either a sandwich or rice bowl. The marinade they use has such a great flavor, especially compared to the other crisp, fresh toppings.
A huge plus for me is how genuinely friendly and enthusiastic the staff is. If you've never had vietnamese food, they are excited to tell you about their products. They chat with you and get you know you while you wait. It's overall a great food truck experience.
I usually check to see if the truck is nearby when I'm getting snackish. Check it out!