there should be some leaf that has a soft thorn and taste very bitter. I forget the name
The problem with PHO, same as @gooddream has said before, you need to have mastered on how you mix the herb and spice. put in all doesn't give the best result. You need to know when to go spicy and when to go sour. So eating at the same place can give you a very different taste and flavor.
!BBH !ALIVE