That link sure doesn't provide much information.
Poking around on their site I gather they are using a spherical bearing (like a rod end or Johnny Joint) in place of the ball joint. Their rebuild kits suggest a 2 year lifespan, depending on usage. But they don't say what kind of usage is going to lead to a 2 year lifespan. It is one thing if that is 2 years of highway use, another thing entirely if it is 2 years of KOH type use. If the former that is no upgrade. If the latter that would be awesome.
The only objective advantage I can see is the ability to change these inserts without needing a ball joint press, but that comes at the expense of not being able to source replacements at your local Napa/O'Reilly's/Vatozone.
Not a choice I am inclined to make, but for someone who doesn't mind the cost and is willing to invest in spares up front there may be a benefit in the ability to make a quick repair and get back in operation in less time than would be required for ball joints.
