I'm having the same negative experience as one of the other reviewers. This ink
seems to dry out, and acts like it ran out of ink even though it is still 75%
full of ink. I love my Jetstream 4+1, and I even like the writing quality of the
ink, but the I can't justify buying more refills when i shouldn't have to.
Great color! The intensity of the ink is dark and the ink flows well. I have no
reservation about this ink and would recommend it. I have gone through 2 refills
so far and the ink only stops flowing and only loses intensity when the ink
cartridge runs empty. The green is a great contrast to the black, red, black.