I went to one particular location yesterday. We took guests from out of the country to see what Americans eat. The wait was pretty short though - at about 15 minutes.
Their impression wasn't that great. We ordered a couple of jambalaya pasta entrees, two sandwiches, and a kid's meal. I was OK with the sandwiches since I know what to expect, but they complained that the bread was too tough. The pasta was overly salted. The chicken/shrimp on top was bland. When it was mixed, the result was still way too salty. About the only thing they didn't complain about was the sweet potato fries that came with the sandwiches.
I'd probably go there again knowing that there are good and bad days with any chain restaurant, but they specifically said they don't want to go back. They have the leftovers (a lot) but I'm not sure if they're not going to just toss them.