David Eason Edits PDFs like a word processor! That is what impresses me most. It also has a lot of export options like export to DOC
Here is their blurb for the Professional edition:
The most affordable & complete PDF solution
on the market! Key features include:
Open, View, Edit and Print PDF files
Create PDF from Word, Excel & other formats
Convert PDF to Word, HTML and image
Enhanced annotation tools
Highest password security (256-bit)