I bought a Logitech digital pen once, and it turned out to be a total white elephant – you could only use it on special (and expensive) paper that seems to reflect the optical laser to itself. So you were stuck carrying around the pen, the noteblock and post-its because you couldn’t use it on anything else.

Aiptek has a digital tablet that can do the same thing, but at EUR. 113, it’s cheaper than the pen, and looks as though you can use any pen on. So no worries about renewables. Looks good to me!