I'm not going to sit here and tell you that Federico's is the best Mexican food in Arizona. I can't do that. BUT it is a great 'greasy spoon' restaurant that always hits the spot. It is a convenient location and the drive-thru is fairly quick. It's a step above fast food. I've probably hit the drive-thru at least a dozen times over the course of the last 3-4 months. I've never gotten a hint of food poisoning, but I've always stuck with basic / popular combo items on the menu. I've never stepped foot inside of the place so I cannot comment on their cleanliness or in-person customer service. I will say that Federico's has always served me up a healthy portion of Mexican food. I've had their tostadas, tacos, carne and enchiladas and all of these items have always cured my cravings. Again, I'm not saying this is absolutely the BEST Mexican food in Arizona. I'm simply stating that for convenience, portion-size and value, I would not hesitate to continue hitting up their drive-thru for a quick, easy meal.