Jenny R and I popped in here this afternoon. I've walked by a few times and noticed the long lines and crowds inside. I had to see what the fuss was about.
I'm very impressed. This is my new favorite burger spot. They have normal size burgers (i.e. huge) as well as mini versions. I got a mini because I'm watching my figure and it was the perfect size burger for me. The burger comes naked as a Jaybird. If you want something on it (and they have quite a list of toppings) you have to specify. The burger was one of the best I've ever had in my life. Perhaps it was the grilled onions and mushrooms.
The cajun fries were smothered in spice and made my tongue sweat. I liked it! ("Small" must mean "enormous." Get a small and you can easily split it was a friend or two.)
Five Guys wasn't any more pricey than any other burger spot around town. The mini burger and small cajun fries came to $6.50 ish. (No drink for me. I only drink water, and that's always free.)
I'm only going here for burgers from now on. I'm very pleased to see this on Mill Ave.