An okay experience.
It's a shell of the actual fast-food restaurants, but it fills the hole for a quick bite and drink while traversing the Rio. Service was adequate, although I attacked the restaurant when there were no customers. So maybe adequate is not good enough when I'm the only customer.
The Whopper was bland. The ingredients were fresh enough, and I saw the server make my hamburger so I know it wasn't premade. But it just tasted bland.
Overall, it's just meh.