Now I tend to view fashionable office supplies as productivity fetish items. It's easy to geek out on that stuff, but does a better notebook make me more productive? Seems to make me less productive, if history is an indicator.
Yeah, I will occasionally find myself reading reviews of immaculately designed mechanical pencils, or minutely engineered Japanese scissors. But I try not to lose sight of the advantages cheap, lousy stuff has too: disposable, easy to replace, low barrier to use. These qualities are also valuable.