1. Yes. It was good, convincing.
2. I tried. I made up a file system as the book suggested, and started using it after organizing my office at the time.
3. I found that a lack of software to help me manage the actions was a problem. It was still the early days and they didn't have an app for my phone at the time. I tried to get my GF to go along with it, but she wasn't into it. Because of these reasons, it just died off. So, it didn't work for long.
4. I think it is worth reading anyways. Maybe you'll have better luck implementing the ideas in your life.

Good luck!