So, a visual inspection of the commands and their results in a sandboxed machine was about all one needed to know that they worked. My experience with similar tools helps there. More concerned people can thoroughly cross-reference them with the documentation, source code, program's author, and so on. Whatever level of assurance they like. The basic level, though, was incredibly simple.
I'd take using GPG over learning Emacs or OpenBSD any day. In level of difficulty, that is.
I'd have to use my brain with either OpenBSD stuff or Emacs. Of course, I cheated there too: Absolute OpenBSD. I know I could've used their great docs for everything but the reviews of the book were too good. I had to attempt using it to shortcut the learning process. Lol.