FREE sandwich on your birthday. Just show your ID. That's how I got hooked. I was on a mission back in December to get as much free stuff for my birthday. Since then I've been back many times since. Their subs are delicious and staff is friendly.
I've tried a couple different subs but my personal favorite is the Hook and Ladder. Sweet honey ham and turkey. They have a wheat bread option and I like it 'fully involved.' If you don't like the regular chips they also have brownies and cookies with no up charge.
As part of their charity they sell pickle buckets for $2. Just a side note that's cheaper than a Home Depot bucket.
The best part Firehouse subs soda fountain. 120 drink options. which includes diet vanilla coke. I don't know of any other place that offers this. Even though there are closer sub and sandwich shops where I live, Firehouse subs is worth the drive.