It's not fair to brand In and Out burger with the "chain" tag because the burgers are just so bloody beautiful.
The meat is fresh, I believe the rule is that it can never be frozen and so they only source their burgers from a farm close enough to each restaurant so that it doesn't have to be frozen.
Most people will get the animal style and be adventurous however I am a real plain Jane and stick to double meat and double cheese in a lovely slightly toasted bun, perfection!
One of the most painful things about moving back home to England is not being able to have In and Out burgers as a staple part of my diet. I miss you meat heaven!