The only thing that brought us to Tacos N'Ritas was the Groupon deal for the yard sized frozen margarita. I bought it while I was waiting for my luggage at the airport and it was good to use by the time I got to the MGM. The margaritas are okay, much sweeter than Fat Tuesdays version. Can't taste much alcohol nor did it get you that intoxicated.
Staff is efficient. Food is decent/okayish.