Let's face it, there are a lot of places to get a good gourmet burger, including my back yard, but the yummiest burgers are at Lobby's. Lobby makes the rest look average.
Whenever I am in the Tempe area, I always make it a point to pick up and take home burgers (you can dine in as well). If you are in the mood for a juicy burger (and quick) they are way better than any fast food, but not priced much higher. ...AND they are actually better than most sit-down restaurant's burgers. Great seasoning, lightly toasted bun, "special sauce", and made to order; simple or the works. They have other items on the menu, but I haven't gotten past the burgers yet.
For god's sake ask for the "specially prepared peppers" on your burger, baby (methinks they are stewed and dang they're good). Plus - you know you love it when the owner takes your order... Lobby works the joint himself most days.