This has been my favorite Mexican restaurant since they were a hole-in-the-wall diner in downtown Sioux City in 1978. Their third and current location on US 75 is kind of run down, but the food is still delicious. This is old school food without trendy stuff like cilantro and avocado, and they do not serve alcohol. My favorite item by far is the corn entomatadas, a Oaxacan specialty that I first encountered at Navarette's. I went back there for the first time in eight or ten years recently. Nothing had changed. The service is still excellent and they still do not accept credit cards.