Super friendly service.  Honestly, this isn't the place to go if you're on a diet (although they do have salads).  Pretty good variety of fried foods and meat products: burgers, hot dogs, potato- baked, fried, in wedge form...onion rings, jalapeño poppers, mozzarella sticks, fried mushrooms, fried shrimp, fried chicken tenders...
I'm attempting to go meat/dairy free, which might seem difficult in a place like this, but the cook/cashier was really accommodating and I got a BLT minus bacon and mayo (add mushrooms and mustard) and some really awesome potato wedges for under $5.
This place supersedes any other fast food restaurant in the area.
Tip: they put cheese on many things here (inc. BLTs), so if you don't want it, speak up.
While road-tripping from MA down on to Austin Texas a gentleman and his lady are likely to develop an appetite, and so much will be experienced. Burger Express was worthwhile. The friendly hometown staff were pleasant to deal with, and the food was proper. The order/review:
Cheeseburger: fresh white onion, lettuce, tomato, ketchup, mustard, mayo. The meat  was similar to what is served at Burger King sans the grease. A clean and decent burger, a 6.
Grilled Chicken Sandwich: fwo, l, t, k, m, m. The chicken was freshly cooked and tasty, with the sandwich overall having a good clean feeling, a 7.
Pulled BBQ Pork Sandwich: lettuce, tomato, onion, mayo. The pork was fantastic; entirely tender, a hint of smokiness, excellent and unique barbecue sauce. A 10.
Fries: The ridged ilk of fried potatoes, crispy and in no way overly greasy.
Overall I had a fine experience, the food was clean, the burger and grilled chicken definitely good, with the pulled pork and fries being on the level of awesomeness. I'd normally give it a 3-star given the "a-okay"ness of the burger and chicken, but they were clean and didn't leave me feeling greasy and guilty, and the pricing was solid, all these things cost something like $13, a great deal for relatively healthy American fare done well and with some finesse on the BBQ pork. Def a recommend. The one regret: they'd sold out of their home-made strawberry turnovers, a relative bummer.