I had the carne asada fries and by the end of the night, I was sick to my stomach. Not food poisoning - the oil that was used to cook the fries must have been either dirty or old. Husband had the nachos and I had some of his chips, so I know it was the oil.
I did like the flavors, though, and I would probably return if I had an urge for tacos while in Vegas. That said, living in LA means access to the best tacos around, so the chances of my getting tacos in Vegas are slim.