I was told that the best was at Ztejas in Tempe. I went there and found it to be weak.The food was even worse.
Best Margarita Phoenix 2008 - Cien Agaves
They've got nine very interesting margaritas on the menu at Cien Agaves — and though we are normally a sucker for things flavored with pomegranate or tinged with tamarind, we never exactly got around to trying any of the specialty versions here. Why? The house margarita — just $4 during happy hour and $7 the rest of the time — was so damn good that we pledged our eternal loyalty on the spot. The Jose Cuervo-based drink tastes just as good as the top-shelf margs we've had down the street. And unlike some lesser Mexican spots, Cien Agaves would never dream of using bottled sour mix instead of fresh squeezed lime. Perfecto.