This is by far my favorite add-on. Sure, I might use a few others more often, but this does such a good job at a complex task. I use it to capture the webpages I want to read. I then load them on my ereader, where I can read them without the eye strain caused by a glowing monitor. I use it daily - it now plays such a major part in my web use. I use it primarily to grab news stories, science articles, wikipedia articles, etc. I also use it to save recipies - makes making a personal cookbook with my favorite recipies so easy and makes trying new recipies simple.
I don't see much useful in the shared book section, don't let that scare you off as the user-provided content says little about the quality of the script itself.
Lastly, I found it very helpful to learn how to create "detection rules" to control just what it captures. It nearly always does an eerily good job of getting the right portions of a page, but it didn't grab the content correctly from one paid cooking site I use often. A simple rule I made based on the example made it work.
Thank you for providing this!