We went once, and that was once too many. I don't mind the wasted money, or the pollution done to my mouth. A good margarita could have cured that. But bad drinks are also part of their shtick. No, what bothers me the most was the wasted time. If I could have that back, I'd give them a second star just to be civil.
You'd have more chance of getting food that was authentically south western or mexican at a Long John Silvers. When they finally let the food police out, this place will get cited for nasty fraud.