Stephanie Wilkinson showed me how you can use them with high grade watercolour paper to get quite a different result.
It was in her workshop that I did this sample piece, using a style that she refers to as ‘pattern painting’.
Unlike graphic paper, which gives you a flat, comic finish, the watercolour paper sucks the ink straight out of the nib, giving a deeply saturated and almost painterly effect. Admittedly you get through twice as many pens this way, but I guess that's the price for such a vivid finish.
You can also layer them and, because they flow so well, I've found them very enjoyable to draw with. It's also a much more casual affair than getting out my paints and easel and so on, meaning that time-poor people like me can enjoy doing impromptu little sketches far more often than before.
After my session with Stephanie I had fun banging out this series of informal little sketches at home, mainly to amuse my animal-mad son. I'm sure I'll be playing with these pens some more, when the urge next hits...