I've found the Las Vegas Carls Jr's* to be as disgusting as the Hardee's in my home state of Wisconsin, YMMV.
OTOH, in the early 80's I enjoyed my hometown Hardee's as a place to hang out with my high school friends. For a year in the early 90's I enjoyed visiting that same Hardee's as a college student.
*In my two visits of the last eleven years.