LEGENDARY. This iconic place is not a tourist trap as you might think located on the strip and flooded with bright lights. It's a super legit Mexican spot that is a weekly stop for me.
After entering I go to the far left line which leads me to Tacos al Pastor happiness. Watching the highly talented and efficient guy cutting meat off the rotisserie is worthy of tossing a couple bucks in the tip bowl, which he always acknowledges and thanks me for.
Only thing is don't come in here drunk, slow or stupid. This place means business, especially when they're busy. Kind of like the soup nazi in Seinfeld - be ready to order by the time you're at the counter. They don't have time to hold your hand and help you think through your options.
After ordering you receive your food and then have to walk over to another counter to pay and add drinks if you want. I always get an orchata with my meal.