My understanding that a Chick Fil A franchisee can only have one. That was supposed to keep quality up. I have had decent sandwiches in Springfield MO and lousy service in Loveland CO s( two managers BS ing behind an open unused cash register and it took ten minutes for me to get noticed and to pay for a drink. Somehow they haven't noticed their only cashier had a long line to people ordering food). This was a few years ago. I find the sandwich to be relatively mediocre.
Same with In n Out. Prescott AZ store was too busy to my liking so never tried the food. Ate at one in Barstow CA on a Sunday afternoon and got mediocre food, slow service and an overall lousy experience. Have never gone back, even though they are now in Texas.
Culver's seem to have really good fried foods. I don't think their butter burger is very good, either, so I don't order it. Tenderloin and fish are done well. I did have a good burger at Braums (a relatively local Kansas-Oklahoma-Missouri restaurant/milk/ice cream combo store chain) a couple of weeks ago.
As far as chicken sandwich goes, best chain one I have had lately is one in East Wichita Chili's $10.99 value meal special they are running. It is a real chicken breast and not pounded to death. All items were hot and fresh. I have also had good and bad experiences at KC Metro Chili's, so I don"t go to them very much (2 yr absence or more). Hardees also had a good chicken sandwich five or more years ago and changed it to the extent that it became less than mediocre in my area.
The largest Hardees franchiser (Boddie-Noell Enterprises, Rocky Mount NC) is one of the best franchisers and did a lot of innovations the Hardees chains adopted originally. My understanding is they do the VA, NC, SC areas. The Hardees on Bragg Blvd was one of the first open in the 1960's and where I was introduced to their food. Today over time the midwest Hardees changed and the Carl's Jr buyout did not improve them at all. Today, the only Hardees that is still open in Kansas and Metro KCis at Ottawa KS owned by Love's Travel Centers. All the others are shuttered and going through bankruptcy of the CO based company.