Pay at the pump only when Sarah's Dinner is not open, then you can pre-pay via cash or credit card. Nice, quick, easy access, right off the road pumps.
Cleanest restrooms I've come across are KwikTrip ones
Good pizza cheap fountain soda's and the employees are great people
Kwik trip has great service & cashiers are nice & courteous.
Always clean. New station. Prices a bit higher than other Kwik Trips closer to the city, but over all a good place.