Best tacos I've tried in the city, particularly the al pastor. But at $4-$4.50 each, they strike me as a bit pricey given the no-frills setup, postage stamp-sized store, and location.
Also, there is a huge lack of seating -- only 5 or 6 spots at the window -- which is a problem when people sit around "savoring" their meal and taking a dozen pictures for Instagram. Eat your damn tacos and get out of there...shouldn't take more than 8 minutes.