Pretty good burgers. Can't beat the price. Specials on the app plus gift cards for 50% off. Which means paying as little as 25% of regular price.
Some other burger places have some good deals on apps from time to time.
It's a burger. Grilled hamburger on a bun. Usually with cheese. Plus some other toppings, whatever you like. If the place does a decent job of that then price is the difference. Why pay $10 for an average burger when you can get the same thing for less than $2.