I spent 2 months working in Charlotte and JJ's was often a go-to lunch spot for my coworkers and I.
They have a great selection of different hot dog types and even have vegetarian and turkey options. I usually don't even like hot dogs, but JJ's makes some amazing hot dogs. The pricing is also very fair for the quality and quantity of food you receive.
The atmosphere is comfortable and they even have a rooftop dining area if the weather is nice! The service was always excellent and the employees always seemed upbeat.
I definitely recommend this place and I will be back next time I'm in Charlotte!