Cook out is a great alternative to the same old fast food like mcdonalds! They pride themselves on their food being more like what you would eat at an actual "cook out" (get it?).
My favorite item is probably the corn dog! Can't beat it for 99 cents when that craving for a corn dog hits. My favorite side item is the hush puppies and the only one worth getting - the fries and onion rings aren't that good in my opinion! They also have a pretty good grilled chicken sandwich.
The only thing that I would complain about is the menu. I think it's confusing and difficult to read/order from the first time you visit. If you have never been to a cook out it may be overwhelming. I would suggest looking up their menu online first. If you are in the mood for a milkshake the list is pretty extensive and I'm sure they have your favorite flavor!