According to QSR magazine, this retailer generates more revenue per restaurant than any other fast food chain in the US. And they only trade 6 days a week! They focus on two simple things, great tasting food and exceptional service.
Digging deeper, their focus on their people is quite remarkable. Their rates of pay are similar to their competitors so it's not higher pay that makes the difference. The company says its because of their focus on investing more than other companies in training their employees and advancing their careers - regardless of whether those careers are in fast food.