This is a black with hints of green in the ink. To me, this ink isn't stunning and it has some drawbacks. I have only used a sample of the ink and there may be some variances due to the sampling.
Also, I dislike the Sailor bottles, which really colour my views of their inks.
I sampled this ink in a Karas Kustom Copper pen with a Bock Fine Nib. Since I am used to Asian nibs, this nib feels like a Medium/Broad. I've used only one other sample through this pen and I recall that ink also seeming to be dry.
My impression is that the ink runs dry, but this may also be an issue with the pen. The ink initially ran Black-Green, but the green has faded (oxidization?) over the last two weeks. The ink stutters after writing for a while, then I prime the feed again. The ink has very little shading and I can spot no sheen
I would go with a Meh! for my impression of the ink. Could be nice, but this ink isn't for me.