Yeap, I'm running a Viper w/Amsteel synthetic cable - braided steel cable is quickly going the way of ancient technology, especially on todays lighter UTV's. Like Steve said - run a aluminium fairlead - the roller fairlead will chew up the Amsteel synthetic cable quickly.
I don't have it on the Ranger (yet), but have used it in the past and it's the shizzle. When my winch cable gets worn enough to justify replacement, it will definitely be upgraded to Amsteel. Of course, I try to not use the winch.......so it might be a while before mine needs replacing. 8)
Ian, I've had it on the spool for over a year. I really like the safety aspect of it over cable. I broke the first rope when it slipped off of the block wheel and pinched itself in the device under an overload pull.
The sythentic fell limp in less than 5 feet. The winch saver ball fell directly to the ground instead of slingshotting dangerously.
Another plus is that it can be repaired on the trail like a ski rope with simple tools.