Stopped by Maxwell Market for our first experience, namely just for al pastor tacos. Got two each at Rubi's and the taqueria next to it (don't remember name), and also a quesadilla (flor de calabaza) at Rubi's. Corn tortillas were fresh and good, but both they were a bit thick for our liking, and the tortillas at Rubi's ended up a little "tough". Still good though. The al pastor was good at both places, but actually we both preferred the taqueria next to Rubi's. It had a deeper, more complex flavor. Rubi's salsa was better though. Quesadilla was solid, but next time I'd opt for something different.
Still think Los Barrilitos has the best al pastor - easily.
PS - don't know if there is a more relevant thread, but searched and this seemed like the most relevant.