There are very few places to eat in terminal 4 at Phoenix airport and modern Burger is one of them. I only had a few moments to grab something before I boarded and this was the place I had to go. I got a burger which wasn't bad but it wasn't great either. It was a step up from most fast food but not what a mid range burger joint should be serving. I also got a hot dog and here is what upset me. They have a "simple" dog that is just a hot dog or they have a modern hot dog that is really a Chicago style dog with a different name. I didn't want the whole modern hot dog thing so I asked them if they could put onions on the simple dog. They refused, the lady at the counter was adamant that they wouldn't add them. When I explained I didn't want all the other toppings she just looked at me. For a second I thought she had gone mute or lost her ability to speak but she glared at me like I deeply offended her by even asking. Their has to be something said for giving the customer what they want...even an outlandish request like onions. You can keep your mediocre food and poor service Modern Burger.