Great street tacos.
There's a somewhat rotating list of fillers, with at least chicken always there. Try the lamb if you get a chance. You order your tacos, go in and pay then come back for your order. Wait time varies, but it's never seemed unreasonable. Beware the fixings: some of them are very, very hot. Get to know them in cautious quantities before you start heaping stuff on: appearances are deceiving. The (fried) tortillas are kept in a steamer: this may work against you during slow periods. (They're fine, except that they get very soft; I'm personally ok with that).
I've stopped there for a quick one while biking by, and we've driven there to pick up dinner for a group of people. Always great, once you learn how the place works. (And do leave something in the tip jar.)