None. Jeep runs just fine, never a hint of overheating. I've always had early warning of leaks so I've been able to change the rads before the coolant loss got serious.
My experience is that Mopar is massively overrated. There's nothing magical about it, it's still just third-party parts sourced from the lowest bidder who can meet the required spec, same as any other OEM.
Most Mopar parts I've ever bought have had "Made in Mexico" stickers on them, and I'm not aware of Mexico being considered a bastion of high-quality manufacturing.
My experience with aftermarket parts is that as long as you don't buy the cheapest, there's no need to buy the most expensive either. My power steering pressure hose blew 4 years after I bought the KJ from new, and after choking at the price of the Mopar replacement, I bought an Edelmann from RockAuto. It's now 6 years old and counting. Even if it had lasted only as long as the Mopar one, I'd've felt I'd got more than my money's worth from it because it was so much cheaper, but the quality appeared absolutely identical.