Pbusardo did a review of it on taste your
juice.
It is a 33hz chipset so it is rattlesnaking even though you might not hear it. (Not that there's anything wrong with it, I can't "taste" rattlesnaking at all).
It looks like it's a blinged up Sigelei Zmax V3 with a nicer button.
If my Sigelei ever goes south, I might look into it. However at 100 bucks it's approaching ProVari pricing and for that I might as well just get the ProVari....