I have three X6s, 200-250, 180- 230 and 160-220 they all work in a similar way, tho the two smaller ones are a reduced diameter grip and the smallest has is narrow reach wave edition. I am heavy >90 kgs and have not broken one yet, but saying that you won't see me doing flaka spinny hoppy loopy things, just the odd chop hop and occasional catapult....So I probably am fairly easy on them. They are reasonably stiff and a million times better than the X3.
And all that said you are about to hear from a heap of folk that will trash anything by NP and totally hate these booms.