So, the admin here was looking at a day planner advertisement, for a day planner that the is ordered for the boss every year. It has some literature with it that explains the benefits of a day planner over a PDA. No batteries, always available, can use your own notations, etc.
One of them was, "No learning curve!"
I think there really is a huge learning curve to day planners that isn't really there with PDAs. One, you have to learn how symbols can be used to mean words. While everyone who's reading this has already figured that out, there are definitely some people who haven't.
Secondly, you have to learn how to open a book. Most people know how to open a book - it was taught to them as little kids. However, if you're used to a PDA, and you're out of practice, you may have trouble.
"How do I get into the files?" he asked, poking the cover of the day planner with a pencil. "This isn't anything like a PDA. This is too hard without a GUI. Get me my electronical gadget!"
Okay, so it doesn't have a learning curve. But seriously, do you have to state that? Is that why someone is going to buy you?