This is a well-behaved ink in a very nice relatively saturated slightly-greenish
turquoise color. At this point I've only tried it in my circa 1991 Pilot 78G
(silver furniture, takes international cartridges), fitted with a Pilot Prera
"CM" nib, and for me this particular pen-nib-ink combo has become a keeper.
This is a very nice color, similar to Diamine Aqua Lagoon. It has a lot of
shading on Rhodia paper on the Kaweco Medium Nib. I find that it's just a tad
too bright (I'm going through a phase of liking darker blues), but it's
definitely a winner if you like inks that pop more.
It's a bit greenish looking under certain indoor lighting.