I was severely disappointed by my experience at Five Guys. With all the hype that this chain has garnered, I found that little of it held up. As soon as I walked in the door I was overwhelmed by the smell of smoke that the griddle was wafting through the restaurant. There were plenty of people cooking and preparing the food, yet it all looked chaotic and unorganized.
Just as other people have mentioned, you can choose a whole array of toppings to customize your burger. That capability is great as long as the cashier rings up your order correctly (which mine was not). Needless to say I was less than thrilled that I had to battle the smoke so that I could re-explain to the counter staff how my meal was supposed to be prepared. Along with my burger, I also ordered the regular-sized Cajun fries. These were definitely fully-seasoned, so if you are averse to spice don't order them. The regular order of fries turned out to be a modest cup of fries stuffed in a brown bag full of more fries. It is almost as if Five Guys' strategy is to overwhelm you by their generosity with their fries, so that you forget that their burger is mediocre and their fries are sopping wet with grease.
The AYCE peanuts were good though; it is a shame that these were the highlight of the meal.