We were at Pacific Commons in Fremont today and noticed that a new Five Guys Burgers and Fries is opening soon. No date was posted either at the store or online, but they seemed to be training new staff as we passed by.
For those unfamiliar with the chain, their burgers are larger and more expensive than In N Out burgers, but they do offer a variety of free toppings. (However, comparing In N Out to Five Guys is a bit of an unfair comparison - they seem to be filling different niches in the burger market.) They're good burgers and their fries, I think, are certainly better than In N Out fries. I've only been to Five Guys once, and that was in Indiana. I'm sure others who have frequented the chain more often can give a more adequate description of the restaurant.
Five Guys Burgers and Fries
43810 Christy St, Fremont, CA 94538