I get a lot of flak from people out west for my love of In-N-Out Burger. They're spoiled.
The last time I went, I got a 3x3, animal style, with green chiles, extra toasted buns. It was amazing and I wish I could drive to one right now. Alas, I'm in Illinois.
These establishments are always clean. Staff is always fine. Sometimes, there's a pretty good wait, but it's totally worth it.