Dont build it up in your mind too much!
Best things about in n out, the only fast food burger I will/can eat:
The food is straightforward without msg and other fake flavorings (which is why I cant even eat a fry at some of the other places, I react to msg). And In n Out, the food tastes like beef, or potatoes! You can see them peeling and slicing the actual potato and frying it. The shake is real ice cream.
They have cool combos not on the menu. (Lemon up- lemonade+sprite; animal style means covered with more sauce; protein style means lettuce wrap instead of bun)
The people who work there are always competent and friendly. They get the order right 99% of the time. Carls Jr. and McDs are doing very poorly with my sons plain hamburger - they get it wrong 200% of the time lately (meaning the second time, it is also wrong, possibly a language barrier, but I say ONLY THE MEAT AND THE BUN and it just isnt working).
Simple and clean and friendly and good.
Well, I hope I get to try it!