I didn't have high expectations for my sample of this ink, but was surprised by the color (more blue-grey than true grey) and the shading (considerable!) It may be too light on finer nibs, but I used it in a wet TWSBI broad, and found it easily readable. I did not have trouble with bleeding or show through on my usual papers--bank, rhodia, oasis.
This ink was absolutely horrendous in a Piccadilly journal, soaking right through the paper, with some of the worst feathering you’ll ever see. It was slightly better in a Moleskine journal. Even on a Rhodia pad, it makes its way to the other side of the page, but has virtually no feathering or spread. The real surprise here is it performs pretty well on HP Premium 32# paper, with significant spread (M to B), but no feathering or bleed through. In these tests, I used a Fountain Pen Revolution Himalaya V2 with a medium nib. Play with a sample before even considering a full bottle.