Just wanted to mention these two places as being fine sources of road food. We took a road trip from the Boston area to Montreal last week and our schedule had us passing through Burlington around dinertime both ways. Neither my traveling companions nor I were looking for fine dining, we just wanted some solid chow to help us along the way.
Al's was pretty much the experience I was expecting based on other messages in this forum. Great fries and basic greasy burgers, much better than any chain fast food joint and with heaps more atmosphere.
Henry's Diner was also a fine example of its ilk. All the food was good and solid and the service was very friendly. I especially recommend the sweet potato fries (with honey-mustard dressing) and the milkshakes. Does anyone know if they make their own desserts? All we had room for was a piece of peanut-butter pie, and it was quite good.