It's good, but not great...not sure if it last in Chicago.
They might do OK on the North Side which is home to hordes of young transplants from Michigan. On the other hand when the novelty passes.....afterall Nathan's bit the dust here.
Nathans has in my opinion a poor tasting Hot Dog. If Leo's uses a Koegel or some other quality Michigan natural casing Hot Dog there is no way they fail. Vienna Beef Hot Dogs are good but not in the same Zip Code of a Michigan Hot Dog. Also if Leo's is smart they will put a Chicago Style on the menu as well...I am waiting for the hands on reviews of Leo's...Russ
Leo's uses a Koegel's, which I am dying to try. They also offer a Chicago Hot Dog. It's tough comparing a Vienna or Nathan's to a Koegel. Koegel's are beef/pork franks with a milder flavor and a different spicing. Nathan's in my opinion is a very good dog, but very garlicky. Maybe too much so. Vienna is good, but milder than what I'm used to in a beef dog. My preference for a beef dog falls somewhere in the middle.
I don't know what year, but Nathan's did open up a franchise in Chicago and it failed miserably. Nathan's are hit or miss. Some use a griddle and a natural casing frank; others use a skinless dog and prepare it on a roller grill. My guess as to why Nathan's failed is that a Nathan's tastes very different from what Chicagoans are used to.