If you check out my monster truck build thread you can see that I am running one.
Eventually I plan on upgrading to the 4" wider diesel radiator. It will be the plastic/aluminum radiator.
Probably have 1,000,000 miles on various iterations of aluminum/plastic. Only ever had issues with one(s) in a 2008 Ford F-450. When you figure that into the equation it isn't hard to realize you don't blame the aluminum/plastic.