It's meant to be a break cue only.
That's what they tell you but not only does it jump apart but also full cue ,
1
I'm not sure if it's the first version or not, but I've heard that the ferrules are pretty weak on those. I talked to a guy who said he'd been through four ferrule replacements, but despite that, highly recommended it. I know my repair guy really doesn't like them because of how often they come in needing the ferrule replacement.
I do jump with my BK2 shaft, and having the quickness of uniloc does make me feel less hesitant to switch out. My slimmer hands don't take very well to 14mm shafts.
What's your opinion on the MEZZ PB2? Does it jump well?