I have the Icon UCAs. To be honest, because they came on the truck from the P.O.Someone recommended the Icon billet UCAs. It is also a uniball setup. I'm not sure I can justify the $500 difference in price. Is anyone running the Icon Billet UCA. Are there any specific benefits?
In addition to the uniball strengths (durable, greaseable, rebuildable) the Icon UCAs have rod ends at the mount. This should make alignment pretty easy and quick as you can dial them in or out and then lock them down. They could/should be marginally more durable since there is no bushing to wear out. This is probably offset by the open joint ... which may be tougher to keep lubricated and clean. Another plus/minus of the design is a more "direct" connection that transmits more of the road feel whether you want it or not. I have no point of comparison for the potential durability, maintainability, or handling & ride quality differences mentioned above.
I will concur with Willy Beamin that they are pretty. They look frickin' cool. And as GarandThumb says on YouTube, isn't that what it's all about?