Don't let the long line deter you, we went for dinner and probably were in line for 20 minutes, it wasn't terrible. The prices were about $5 for a burger and fries. I got a boring single cheeseburger with everything on it, and I scarfed it down. The bun and the meat were so soft and so good. I liked that the patty was pretty thin. Most of their special burgers come with 2 patties. The fries were good even though I don't prefer shoestring fries.
The onion rings were really good and crispy, the food arrived pretty quickly, the waitress was very helpful (Kaz or Karen), the chili 3 way (on spaghetti) was good, too. They also sell chili in cans to go for $2.99 each. The vanilla coke was also perfect - not too much syrup.
The others in our group tried the Chipotle burger, Buttery Wisconsin and the one with a fried egg in it. They all were happy.
There's also a separate "To Go" line.