This is probably the most authentic, family owned and operated Mexican restaurant in town. And by family operated, if you are bothered by abuela helping out with service, even though ella sólo sabe algunas palabras en inglés, perhaps you would be more comfortable elsewhere.
I have been to Cuzamil several times and have never been disappointed.
I recently brought a friend to eat there with me and he agreed that while a glitzy, better capitalized chain restaurant might provide better decor, lighting and canned music, in terms of what is actually served at your table, it was much better than the typical Mexican themed chain restaurant he was accustom to frequenting. The food was top notch and the margaritas were perfect.