i just had 5 guys during my visit back to the dc area. man what a letdown. its quality has surely gone down since my high school days (8 years ago).
the double patties were embarrassing. the two patties were basically the size of one patty, just split in half. (maybe this has to do with the fact that they are "hand formed" and so size controls vary from place to place?...i went to the one on gallows rd in NoVA btw). the taste was only ok now. not to mention the prices have gotten out of hand for what you're getting. yes the burger is "good," but for those prices, i might as well go to fudruckers (fuck you guys this place is pretty awesome).
so as of now, my favorite is in-n-out. also i think that carls jr has also leapfrogged 5 guys.