I've seen a bunch of 3D guys shooting the Octane Hostage XL. I was actually thinking of giving it a go this season to see how much better it does than a whisker biscuit.
The guys I spoke to about it said they love it. They said it's just like the whisker biscuit with less contact on the shaft. I'd say it's probably much quieter than a drop away also. Maybe quieter than a whisker biscuit.
BTW, govols; because you posted this thread, you have motivated me to go ahead and get the Invasion CPX. I've had my eye on it for a few months, but wasn't gonna pull the trigger because I am interested in the Z7 Extreme as well. But the Invasion is just soooo much smoother and seems to be way more solid.