You can't write fine lines, regardless of which size you use or how you use them they all write the exact same thickness

Even the finer pens leave big, thick messy lines

The tip of the pen doesn't make a nice thin line and I was very disappointed

Although the letters were still readable, the thick lines were indistinguishable from the thin.

I couldn't get a clean line because of how much the ink was flowing

Fine tip does not give crisp clear lines, I could get better from a fine tip sharpie

I'll try to redraw the line and by the time it comes out like it should the line is thick and blotchy

, they do not make thin and thick lines as other calligraphy pens do, there is no calligraphy effect from these nibs, just solid lines no matter how you try

When using ink that does belong to this set it feeds to much and makes it hard to create proper line variation

I ordered these and hardly any of the pens actually wrote a consistent line

For metal nibs, the lines are not clean.

felt tip calligraphy pens on the market that write with cleaner lines

The nibs are thick and therefore make extra fine lines difficult

The wider tips work better but none produce clear sharp lines.

I gave these to my nine-year-old for practicing as I was unable to write a truly fine line even with the smallest nib

Also three out of the ink cartridges where dry and one came completely exploded, staining the pen lining