Rally's isn't a "fast food" in the sense that you food is flying out on a tray 10 seconds after your credit card is swiped. It took about 3 minutes for my meal to be prepared with generally nobody else here.
So if you are in a rush... go to Taco Bell or McDonalds.
With that said... I ordered the Roadhouse Bacon Burger. It was good. The bread was even flatbread, which made it more than just standard burger.
Fries are awesome too. No ketchup required!