I got a sample of KWZ Sheen Machine since everyone praises it, and indeed it sheens like a machine.
KWZ is 2/2 on accurate descriptions. It reminds me a lot of Endless Alchemy Candy Sea, it is very close in color/look.
Scans
The scans minimize the sheen, but some still manages to shine through.
Video
This video was taken inside a light tent where the even light is not the best for showing off sheen, but even under these less-than-ideal conditions, it’s still easily visible.
Photos
Iroful changed a lot by angle, col-o-ring was consistent.
The Iroful card was still wet in the dark line down the middle when I took the photos, and still tacky months later.
The base color is a bit darker than Candy Sea, but the sheen is quite similar.
Microscope
On Iroful, more of the base color shows through and the sheen is more concentrated.
Chromatography

It’s blue through-and-through, though it moves from a light slate blue to a deep dark blue.

Nothing too noteworthy under UV light.
Uniqueness
I don’t think I have all that much ink in the grand scheme of things and even I have three other inks with similar properties:
Verdict
It looks great, but I’m not sure I’d pick it over the other alternatives. Especially since I already have larger bottles of the others I mentioned.
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