Second visit gets a one star bump from my first review. I now consider Modern Burger to be a destination for dining in the Phoenix airport.
Friendly service at the counter and quick delivery of good, reasonably priced (for an airport) food. This is not a meal to eat trying to balance on your lap at the gate though, a.k.a messy!
And the burger...? As the foot f'in master once said, "This IS a tasty burger!"