Part of Corky's obvious charm is that it's an old fashioned drive-in/root beer stand. The burgers have always been super juicy and greasy (I recommend the Olive Burger Deluxe basket), and the fries are much better than last years. There's a surprising variety of items on the menu, but I'll admit I just stick to the burger/fries/cole slaw combo.
As far as service, it's a root beer stand, so the employees are really just a rotation of high school girls; your mileage will vary.