I visit Arizona every two months for work, and make it a point to always come here for breakfast.
I doubt anywhere else compares, and I wouldn't even risk finding out, because that means I'll miss out on either an AZ Burro or a Breakfast Buzz.
Healthy Drive-Thru? Impossible! D'Lish made it happen, and they are quick. Even if there's a line, there will be someone taking orders so that the visit is as quick as possible. I've never had to wait longer than 15 minutes.
There's a large menu, and I'm sure it's all wonderful, but the AZ Burro and Breakfast Buzz are FANTASTIC. It starts the day off right. Do not order both in one sitting...
Parking is tough if you want to go inside. That may be the one caveat if I were to think of one.