This is the only Mexican place I've been to in Calgary that captures some of the spirit of the places I've been to in California (but I haven't tried the taco truck yet). They've got the imported bottled Coke, it's a bit rough around the edges, they serve tongue, and the tacos taste good.
There's only one round table (seats 5 or so) in there, so plan on eating outside, in your car, or standing up.