I've been wanting to go to Johnny Burrito for years, it has a cult following in Charlotte.
The line was enormous, just prepare for that--a long line is always a good sign in my book! To be perfect honest, it moves quicker than you'd expect.
The decor is fun and bright and full of mementos which really speaks to the history of the establishment. You could spend an hour just reading everything on the walls. It's a small space, but the counter is structured to bring customers through one side and out the other. There are some tables outside Johnny's if you're looking to sit and eat.
The food is great. You order and pay and then move down the counter--adding ingredients to your burrito as you go! The menu is relative limited, it's the basics and it keeps you from being overwhelmed. The serving portion was big and well worth the money. They also have tamales on Fridays worth checking out!
I recommend a regular sized chicken burrito with all your favorite toppings to start. You won't regret it!