I've had them in 2 chains that I can recall: Jillians and Garfields. The Jillian sandwich was good and properly made. The Garfield sandwich used shredded pork.

I have made them at home; although the bread in not authentic, it is close enough, and I use my Forman grill to press and heat. I'd have them more often but finding sliced pork in the deli is a hit or miss thing.