Basically, one can choose to go to Subway for a "fresh sandwich", for $5, or to Carl's for the ballpark same fish sandwich at $4.
AND: here's what my cross country road trips have found.
MCD's has it, wrapped up at the easiest stops, most visible.
And I go there, even tho the food isn't what I want, at least the regular coffee is usually good.
I did go to a WEN on a recent trip from OR to CA in late March of 2011, and bummer number one, they wouldn't honor my coupon. Bummer number 2, the male who was to serve me looked as if he hadn't showered This Week.
I left. And would have, regardless. And I did go to Mcd's, right next door. Even tho I didn't want to.