One of my favorite inks. I actually think it's the perfect blend of blue and black...though it may not be as dark as vintage blue-blacks it's a good neutral color. And pleasing. Not as much character as the Iroshizuku Shin Kai, but more character than normal Pilot Blue.
I have edited the first entry to this review, changing to a scan of the page instead of a photograph. Hopefully this will provide a higher quality image and more helpful demonstration of the ink.
I've used this ink in carts for awhile in my Pilot VP. In his pen I've found it easier to use the box of carts that came with it so I don't have to fill it sometimes twice a day when I'm taking lots of notes.