I'm 100% biased on this one as I'm from Illinois. I could eat here everyday if cholesterol, blood sugar and morbid obesity were not a factor. Their hotdogs are can't lose. They serve Chicago dogs on a poppy seed bun. I like mine with onion, pickle, celery salt and mustard; they almost always come out spot on. They have a million different options but that's how I've been eating them since I was a kid. I will ocasionally switch it up and get a chili cheese dog with onions. The chili dogs are good but often hard to eat due to the massive amount of chili. Anyway, they take you back to being in the city. The big difference is the people in Arizona are much more friendly than in Chicago. As previous posters have mentioned, their cheese fries are killer. They are crinkle cut fries with what has to be an imitation cheese sauce but it is delicious. I would drink the sauce if my wife wouldn't judge me. I can't recommend portillo's enough. The service is always great and it's hard to not leave full. Portillo's Italian beef is also very tasty, I recommend trying it with extra gravy, not dipped, and with hot peppers.