Despite being able to type much faster than I write by hand, I find it much easier to record ideas with pen and paper. Because I'm free to think out of order, I can jot down ideas and concepts as they come to me without worrying how to translate them into words. My notebooks are a combination of shorthand bullets points and doodles that I later translate into prose and code.
Over time I've become increasingly convinced that it's important to be excited about the pens I draw and write with. I've found that this excitement translates into creative inspiration that helps me to overcome lingering urges to procrastinate and to push through mental obstacles. So, even if I could buy cheaper writing implements to do the same thing, the empowering placebo effect is worth it in and of itself.