Went to 5 guys when i was in phoenix a few weeks ago. First time I'd been to one. My reaction? meh.
Perhaps it's because in the area where I live we have a lot of Steakburger and Custard places that make very good burgers so 5 guys wasn't anything special. I prefer Culver's, Freddy's and Steak 'n Shake burgers. I'll stick with Culver's Bacon and Cheddar Butterburger. However, I can see that in Calgary (where I used to live for many many years) it would be better than almost any other fast food joint.
What Calgary really needs is a Chipotle. I might visit family more if one opened up there