I'm half Mexican, so I grew up eating a lot of authentic homemade Mexican food. El Milagros is by far the most authentic Mexican food I've had in Pittsburgh. I didn't hear a word of English while I was there other than by my girlfriend and I.
The atmosphere is a little old and not the cleanest, but that immediately told me I was going to be eating good Mexican food.
The chips and salsa were incredible. Chips were extra thick and crunchy, and the salsa verde was very spicy. I had lengua tacos (beef tongue) and chorizo. So good! The radishes add a nice crunch and I used the salsa from the chips to add some extra heat. I'll definitely be back to El Milagro.