PDFOutliner is great! It works as advertised, and quickly and accurately created a table of contents (what Acrobat calls bookmarks) for a lengthy document. It's easy to use, and the built-in "quick start" guide does a good job of explaining most of the functions.
The only thing I wish I could do in PDFOutliner is indent existing TOC items with the keyboard or a toolbar button, and be able to do it to multiple items at once. As it is, I can only indent them by dragging them up and in with the mouse, and can only indent them one at a time.