Street-side stand right outside a grocery store. You pay for a certain number of tacos at the register inside then tell the guy outside what kind of tacos you want. There's no menu or label of the meats so you'll just have to wait for the guy to tell you. The problem is that they don't know english that well so I know some customers didn't know "lengua" is beef tongue and "bisteca" is beef but that probably makes people try stuff they normally wouldn't get. We got 7 tacos for about $17.50. I'd recommend 3 tacos for a hungry person, that 4th taco was a little painful.
In terms of flavor, all the meats were good and tasted authentic. The carnita and beef (tongue and steak with onions) were all savory and slightly salty like they should be. The texture could be a little better but part of the problem is that the guy makes them in batches and they sit out in catering pans for who knows how long, so they dry out a little and aren't warm when they're served to you. The salsa bar to the left of the stand has great variety and some of them pack good heat. The green salsa was a little bland the day I went but the avocado and hot red sauce were good at adding moisture and heat.
Overall I like Las Palmas, it's cheap and tasty but definitely on the shady end of the spectrum.