Although the resto is in the casino, it is fortunately not of the casino. The noise from the casino is not intrusive or distracting. There are very comfortable chairs around the bar, as well as booths.
Of the Mexican places that I've tried in Vegas, this has my favourite food. The drinks, not so much. The signature margaritas are small, comprised of more than half ice and good but not spectacular. The tortilla chips are plentiful and tasty. The server helpfully steered me away from items that would have conflicted with my allergies, even checking on the marinade ingredients. My fish was perfectly cooked and delicious. The accompanying veggies were crisp and not at all an afterthought. My companion had an assortment of dishes and enjoyed them all. Each dish was fresh tasting, not heavy and canned as Mexican can sometimes be.
The prices are on the higher side, but they are commensurate with the quality of the food, if not the cocktails.