I didn't really eat these sandwiches until fairly recently--and man--I was sure missing out all this time! Delicious! But I've only had the sandwich at Cecil's Deli on Cleveland Ave in Highland Park, and I have the distinct impression that place is overrated.
I think there must be better out there.
I'm looking for corned beef that is sliced thick (as opposed to shaved, as Cecil's does it), and MORE of it on the sandwich. The sauerkraut and cheese need to be there, and sauce should be Russian, though I think dijon might be better.