Cookout has very good burgers, chicken sandwiches, fries, hushpuppies, onion rings, and most importantly, Milkshakes!
The food is good. The best deal is the Cookout Tray. For $3.99, you get your choice of eight different main sandwiches/hotdog/etc (I always get the big double burger, which alone would usually be well over $2). Then you get to pick two sides from among fries, hushpuppies, onion rings, corn dog, and chicken nuggets (yes, you can get more meat as a side, ha ha). You get about 1/2 of a regular order (ie, you could order 12 hushpuppies for $1, you get 6 in the tray). You get a large soda or a HUGE tea or, for $0.80 more, you can get a milkshake. They offer dozens of flavors of milkshakes - my favorite is the strawberry cheesecake. You can also combine flavors on the menu, and the people working are always willing to offer more suggestions.
The service is very fast - double drive through, even! With the tray, for just $2 you can add a cookout t-shirt to your wardrobe, a great bit of local kitch.