We used IVp in high school. And the 100 was my first portable computer for taking notes in class during high school. We even had the desktop dock for the 100 to word process on a 80 column screen.
I still use my Tandy 102 sometimes for taking notes during meetings, much to the amusement of my colleagues! It's a great computer, and one of my long-term project ideas is to design a similar machine using today's technology.
I've thought about using my 100 at meetings but decided I don't want to deal with the weird looks and questions that would inevitably come with it. And the keyboard can be clacky and distracting anyway.