I have similar probably-irrationally-high opinions of In-N-Out Burger's operations.
I've had such excellent service for so many years that even when I have an objectively __terrible__ experience [0], I end up writing it completely off as a fluke, or an inexperienced or frazzled employee. I actually reflected on this the last time it happened, and even recognizing this I still think highly of their service.
They get customer service so right in so many directions that I almost feel bad exposing the rare instances that my visit hasn't been flawless.
0: Last week, in the same visit to the drive-through: "No, I didn't order those [3] shakes. I actually ordered two fries." They eventually got me the right things, and my burgers were right, but I've had that wrong too before. Almost never.