I like the way that I can arrange chapters, notes, and ideas with the drag of a mouse. You can also set the type of binder you would like (i.e., 3-ring or spiral). Customize the paper and the cover to whatever theme you would like. You can customize the look of your notebooks, if you would rather not be reminded of school. As you can see from the screenshot, it is designed to look like a notebook, complete with college-ruled paper.
NoteBook’s interface is very user-friendly. I have used NoteBook for at least five years to gather research for my novels, articles and recently a non-fiction book that I started.