I've been using this ink for about a month now in my Lamy Fine Point Safari.
This pen travels with me everywhere, so the ink never gets a chance to dry up in
the pen. This a very smooth black that, once it dries, stands up well to my
watercolor washes without any smearing. I prefer Platinum Carbon to the
Noodler's Bulletproof Black that I used to use.
Great value! I have one with a medium nib which is great for writing, but the
line is too wide for drawings. So I bought one with a fine nib which I take with
me everywhere for sketching. Ink flows well and the pen action is smooth. I get
thinner lines by rotating the pen nib 180 degrees.
I just got this and after using it for a week, I really love this pen. It beats
my Pentel Pocket Brush and I'm looking forward to trying the Kuretake with
different inks (something you can't do with the Pentel).