I would say this is tof the three Tacos El Gordo restaurants in Las Vegas.. usually there are lines going out the door during the weekend so today was no exception. I really think El Gordo has been a must visit staple of LV for many years now and that's not going to change anytime soon.
They don't do any phone orders so expect to come in and wait in line just like everyone else. Honestly this is the only taco place I'd be okay waiting an hour for. You won't find a better al pastor maybe other than in Mexico.
Tip: they offer plenty free grilled veggies/jalapeƱo so make sure to ask them.
This place is great if you're trying to ball on a budget, because all the tacos are super cheap $1-2 range.