Yeah...it's not like they have crack laced in the burgers...it's just a good burger for cheap. Sounds like you might have gotten a bad batch of fries, although I never get anything on my fries except a little salt. Even when they are good they are a lot different than the crap they pass off as fries at places like McD's...at in-n-out they are real potatoes, sliced seconds before they are fried in veggie oil.
Like I said, it's not so much about it being some crazy superior product. I'm sure there are places you can get a better burger. But there's no place you can get a good burger for that cheap that cares about what goes in their product, and that's actually pays and treats their employees well.