I would give Portillo's 3.5 stars if I could, but I'm ultimately rounding up because both times that I've visited, the Italian Beef sandwich (Dipped) with sweet and spicy peppers was very good and I'd happily come back for the exact same item!
With that being said, the fries are generic and boring (in that they are the exact same frozen, crinkle-cut fries you can buy in the grocery store and make yourself). My bf ordered a grilled chicken sandwich which was nothing special and "very greasy". Had he not tried 2 bites of my Italian Beef sandwich, he wouldn't have any desire to come back to Portillo's. However, he loved the beef and gravy with hot peppers and would definitely come back to get his own!