My husband swears by 5 Guys, and he likely always will. That's great, because when he wants 5 Guys, I can go somewhere I like that he hates.
Personally, I think the burgers aren't that flavorful and they are nothing special. I've NEVER enjoyed their fries, no matter which location I have gone to (Chris finds one on every road trip possible). They are always over seasoned and under cooked. I HATE soggy fries.
Also, for the quality (my opinion of their quality), they are WAY overpriced.
Chris loves the place and even agrees their prices are pretty up there.
The last time I ate there, we got 3 burgers and 2 drinks (note, NO fries even) and it cost us $22!!
For that kind of price, I'll go somewhere I actually like for a full meal!