I liked the idea of them, and I enjoyed seeing what others were doing with them (Matt Huynh!) but when it came down to using them results were never encouraging.
Until I realized my mistake!
I have been using large brush tip pens. Large brush tips do have a fine point but they need a very careful and experienced hand to find them, which I don't have. Smaller brush tips have a more delicate line, making those quick thin marks accessible while still have some weight and fluidity to the longer and thicker lines.
So I had a little play with both, messing around in this image with another way of describing hair, and the chairs I know and love down at coffee bean.