Go for the food, not for the service.
I was originally put off by the older man's attitude when I came in with two other people - he said, "If you can't handle waiting, go to the McDonalds down the street." It was strange because those were the very first words he said to us, no "hi" at all. Nonetheless, we sat down and he took our order.
We came in at about 7 AM, and the food came out at 7:20. There was a younger guy, possibly in his early 20's, that came in to help. He was definitely a lot friendlier.