It really helps to come here when they're busy and the food is turning over quickly.
Also the owner is a jerk. One time over a year ago, I dined in and ordered a drink. The soda fountain is behind the counter so they have to bring it to you. I had already almost finished my second plate of food and still didn't get my drink. When I reminded them about it, the woman gave me attitude so I asked her for a refund for it. Which she gave me begrudgingly. I don't think that was unfair considering I was just about done eating and they still hadn't given me the drink I paid for.
To this day, they are most unfriendly whenever I come in. And I know it's because of that day I asked for a refund on a drink. But I do like their staple items, so I still go here occasionally.