I've had some terribad experiences there, but also some really great ones. The burgers are pretty good, better than McD's or BK or Wendy's for fucking sure. Then they have the drinks and the tots. Chili cheese tots if you're feelin nasty. And the shakes/ice cream is far superior to other places.
Five Guys suffers from not having a drive through, straight up. There have been many times when I have driven farther to go somewhere worse just because either I don't feel like getting out of the car or its late or the kids are with me and being pains in the ass, the convenience factor is huge. If we had a Sonic here, and rumor is we will within the year, I would go there all the time. I find I rarely go to Five Guys even though it is superior, and this is even before my wheat bullshit kicked in.