The burgers were pretty good - but don't get the "double with everything" as it's a little on the messy side, at least for your first time. It was a big mess. Fries are a pleasant surprise too.
However, the restaurant itself is disgusting and dirty, and lacks completely in atmosphere. Bathrooms were putrid and appeared not to have been cleaned in several days. The crowd was also a little scruffy. Although I was there with my young family (kids are 3, 6 and 8), there was a table of construction guys swearing their heads off right next to us, but the table next to us was no better, with a family of obese people swearing openly in front of their small children. This is not a classy place, for sure.
So, I would recommend Five Guys, but only for take-out until they clean up their act substantially.