I had the Pho Dac Biet, or Special Noodle Soup. It tastes like regular beef noodle soup.
The boy had the Bun Bo Hue, or Beef and Pork Leg Rice Noodle Soup, which was much nicer as the stewed meat was really tender and fell away easily from the bones.
I had the nicer drink though. The boy had boring old coconut. I was adventurous enough to order the tamarind drink and I would go back again just for this. Sweet, sour with a generous amount of tamarind fruit and a handful of roasted peanuts in it, which was weird but I didn't mind, as I like having chewy stuff in my drinks.