let me first vent my annoyance at the common mis-spelling of Cincinnati (three n's, one single t please).
that felt good, onto chili discussion. I had not heard of Mellow Yellow, it may be worth a visit next time I'm feeling Good and Hungry. I have had Chili Mac on several occasions, and the verdict is that it's passable Cincy chili. I would/will return.
That said, I'm a Skyline man myself and although I agree for the most part with a previous poster who derided non-Cincy Skyline locations, I have to mention that I have on numerous trips home stopped in Indy at the Washington Ave. location just of the southeast corner of I-465. For whatever reason, it's very much like a Cincinnati location in terms of food quality and service. Plus they have a Reds flag hanging in the back, which I appreciate seeing. Surprisingly, Louisville has a good Skyline as well, although I admit my trip to High Street in Columbus left something to be desired.
All that aside, no self-respecting ex-pat from Southwest Ohio would not have at all times either a stash of frozen or canned (which I prefer to frozen) Skyline Chili on hand. This should be used in emergencies to sate a chili craving, or for parties as the key ingredient in Skyline dip (line glass baking dish with cream cheese base, add chili, top with shredded cheddar, bake until cheese melts, cool and serve).