As a canadian who visited the states (and doesn't have a bunc hof places talked about here), I was super excited to try places like 5 guys (fine burger, ridiculous amount of fries), in and out (pretty underwhelming), and jack in the box. I've wanted a sourdough burger since I was a kid watching sat. morning cartoons. Not only was it pretty gross, I'm pretty sure it gave me food poisoning.
Still haven't tried jimmie john's (is that a sandwhich place a la quiznos or what?) or chik-fil-a.