This seems to be a problem for the chain of restaurants. I have previously reviewed a Firehouse Sub in Frederick Maryland. And I'll repeat that review.
SLOW! I ordered a sub and FINALLY got it 25 minutes later. It was only a so-so sub. Kind of dry, they didn't seem to use any mayo or other condiments. At almost $8 I thought it was overly priced. I've had so much better than this place.
Is it better than Subway? Definitely. But Jimmy Johns is a FAR better sub, FAR quicker service, and a better price.