The fury is the real deal. Not too understable, the hss is nice on this disc. The opto is dead nuts for me on about an 80% throw. Almost no fade at all. The gold line is a tricky little devil, but with some more work i thing it can stick around too.
I am worried for my saints.... The fury flies like I would want a beat saint to fly, but the saint gets too squirrelly and the fade is still in my main saint after 2 years of use. I trust my saint more downhill, but the fury is just too fun.
Stag fury underworld is proving to be stellar for me.