I'll lay a hearty welcome out on the table for this burger chain coming to the Queen City. I've been a fan of these guys since my first visit a few years ago in Tampa. Unique and decent variety of menu items, of which the stars are the burgers (obviously) and even pays homage to some old school joints of olde.
You're bound to land on a burger that you'll like under this roof. My favorite is definitely the Tuna Burger. Though, anything with rare tuna is going to be a hit with me. I will note that the TexMex Stack Burger was good, but lacked structure. The burger artist who assembled my most recent mess decided to put the lettuce and tomato on the bottom. Not sure if that's the Burger21 doctrine, but it made for some slippery handling. Not a fan.
Biggest aspect to approach for you first-timers? The sauce bar. Do yourself a favor and order the good ol' NC favorite -- sweet potato fries, and try out the Toasted Marshmallow sauce. Yep. You read that correctly.
Others of note are the Thai Ketchup and Chipotle Mayo. Both a nice touch.
Prices are decent, though you'll probably pay a little bit more for a full meal.
Have to say it's a big positive for Ballantyne Village. This place will do just fine in the 28277.