Vegas is chock-full of authentic Mexican joints, from taco carts to sit-downs, and of course, Tex-Mex. I was told about this place about a year ago, but I didn't actually visit until I was being carted around by a Latina friend and we ended up here about a week ago.
I've been back twice since the Al Pastor is to-die-for. This huge slab of meat, get this - crowned with a pineapple -, is on a vertical spit being continuously roasted and sliced from. The result is juicy, flavorful, and seared perfection. The cilantro sauce is a great compliment, although you can opt out of you want to taste the meat more clearly.
8 tacos and 2 drinks ran us under $20, which is a steal in my opinion. I ate 5 and she had 3. We were both sufficiently stuffed. The carne asada didn't wow me as much, but I think it may have just been overshadowed by the Al Pastor
Do yourself a favor and check this place out next time you're in the area. Just be prepared to wait if you come around lunch, and especially dinner time.