I have a couple of them. I have no problems jumping with them. They break good enough. I did grind the tip off of one of them and glued a Samsara j/b tip on it so I could legally break in a BCA league/tourney.
Can't beat the price AND free shipping!!! Plus, you get a choice of a soft case or a cue cube.
I have all brand new,the JJ jump break butterfly splice or all stained brown 13.5mm phenolic tip, fury or action J/B with the rubber grips 13.5mm $145
choice of weights.