Yeah, 4 stars is about right for Portillos, mostly because I'm just glad to have a local place serving Chicago-style fast food.
The place is run like a machine, with quick ordering, and fast delivery of your food. The prices are on par with other restaurants with similar fare.
I almost always get the same thing, a jumbo dog and fries, but it's consistently good. My only complaint. I grew up eating this kind of food, and miss the famous hand-cut style french fries from Chicago. Their's taste like they are right out of the giant frozen bag.
The place is jumpin, but there's plenty of places to sit, and lots of room for big parties. They also sell their food in bulk so you can have a "hot-dog" party at your own house ( :