Really, I just don't see the reason for the hype up and down the western and eastern seaboard. One of the fastest growing hamburger chains in North America, they specialize in the basic hamburgers, fries and shakes.
I found the meat to be decent, but actually underseasoned and tasteless overall. I liked the unlimited toppings thing, but that was the only saving grace that they offered for anything in a bun. It was in the fries that they excelled, and found them to be pretty damn awesome. I definately enjoyed the large servings with my friends, and I'm willing to enjoy another order any time any where as a snack.
I haven't tried the shakes yet, so I'll avoid any comment of course.