Burger shack has been in the same spot, doing the same thing for as long as I can remember. Staff are friendly and consistent with their behaviour. Burgers are great value, simple, and don't leave you feeling like crap 20-minutes afterwards. If you're more into overpriced burgers with toppings you cant even pronounce, then stay away from burgershack...otherwise, get off your high horse and enjoy a classic burger!
side note: while the onion rings are epic, i would stay away from these if you tend to shy away from greasy food... They are massive, they are epic, and they may leave you on your back in a food coma;)