When I came to Charlotte not too long ago for a family trip, we ate at Cook Out probably more than like four times lol. It's cheap! And it's pretty good. The portion sizes are good enough for what you pay for, so I can't really complain about that. And you seriously can get a shake for a dollar more if you end up getting the $5 dollar combo (1 entree, two sides and a drink and/or shake).
I'm pro Cook Out.