Since I am left-handed, I often find Prbleme a mating pin, because my writing is very quickly unreadable if the pins too much scratching paper. But despite the thin spring of filler writes very soft and glides perfectly over the paper.
I am thrilled with the price-performance ratio. For the rather low price, compared to other fillers, I got a very visually beautiful pin which also writes beautifully. What more do you want?