I've got a VX 2.1, and a AR2 with Z2. I've used a whole bunch of different cues, but 90% had predator shafts. Having used house cues for most of my life, all I really care about is the tip, and the playing shaft. The rest is just fancy schmancy eye candy. I got my friend a Bolt 4, and used it, used it with the venom shaft, and used it with my Z2, I'm now actually contemplating getting a wrapless poison. Probably a 1st Gen Anthrax 6. If Joe hasn't sold out and cleared his last stock already.
The Jump/Break shafts have threaded ferurles??(is that what it's called when a pin from the tip runs through the ferrule?, so if you break the tip you also most likely snap the pin on the tip that runs in to the ferule, it'll be a sad day. Luckily, super glue sticks to anything. I've tried other bonds, didn't quite hold for as long. The phenolic tip on the Jump/Break makes for easy jumping and crisp breaking. I'm tempted to cut down the play shaft on the 2.1 and retip it for a masse style cue.
Overall I'm quite happy with poison. They fit the Z2's that I love, they're not over priced, and not all models are completely hideous. I also love the quick release bullet joints.