with the amount of metal ink that the pen puts out, you'd think it would run out very very fast
For my own stuff I'd rather have a printing solution that can print on different materials and has higher power capabilities. The stated limits on this pen are kind of low.
It seems they also manufacture conductive Inkjet and some press printing inks for less casual purposes, would be pretty cool to see circuit bases printed onto fabrics though. I can imagine home-made singing birthday cards turning up using this product, domestic hacking products are just plain good.
I cringed when I thought it said Circuit Shibe.