We stopped here late at night on our drive home from California. The burgers were good, but this location was filthy. The restaurant was not very busy, but well-staffed and still there was almost no place to sit because the tables all had trash at the them. We ordered our food and wiped off a table with paper towels.
As we are eating, a manager came around to ask everyone how the food was, and the table next to us pointed out their own dirty table. He left and came back to wipe their table. Then instead of wiping down more, he waited for people to take start looking for a seat, pick a dirty table, and then come to the rescue? It was very bizarre. There were plenty of employees to wipe down tables so more people could sit down at a clean one.
The bathroom was also very gross. I'd avoid this place purely based on cleanliness.