After I had problems with my last refill and the original ink with a larger print volumes (about 1,000 pages per month) is priceless, I'm on the ink of Octopus came out (black, pigmented). The smaller pack sizes are relatively expensive, so I bought the same 1-liter bottle.
The image is sharp and the ink flows well through the printhead. The Octopus Ink is only moderately highlighter resistant. She smells relatively strong, so I subtract a star.
