Love the concept and love the food! I had no expectations walking into Stax, but I was pleasantly surprised when the server explained how they operate there. Basically, they recommend you pick a couple different items because the size of the serving is much smaller than a normal burger joint. Some people may complain that the burgers or whatnot are too small, but I like the idea of smaller servings, but more variety. I enjoy trying different things when I go out to eat, so this was a perfect fit.
If you're looking for a place that allows you to try a variety of options and even allows you to custom build your own burgers/sandwich, then Stax is a great option.