Definitely worth a stop. I've only been to the selma shop. They do give you the freebies that are listed on their site. Got a nice leather 3 finger case with a box of Punch Puros.
They have lots of cool other stuff too. Cowboy hats, cheap books and clothing. The best thing I bought was country slab bacon. Haven't seen it on their website lately, but if they have it you should grab some. It doesn't need to be refridgerated so it's a good road trip pick up.
A little off topic, a buddy of mine went to JR and was dismayed that they didn't recognize him as "the guy from Rhode Island that buys ERDMs". It was hard not to laugh at him.
Have a safe trip.