I ate pho almost every week for 5 years in Richardson, TX. That town has the highest number of Vietnamese people of any city in Texas. So I know pho.
I haven't lived in Arizona for long, but to my knowledge, this is, by far, the best pho restaurant (of the 4 I've been to) in the Phoenix area. For a fact, only La Me is the only Vietnamese restaurant I've ever been to that is THIS good and it's not even namely a pho restaurant.
My opinion is based on the overall combination of quality and creativity of the food, restaurant, price.