From PDF to Word is not allowed by many PDFs. Here's why. When I create such a PDF I encrypt or lock out that feature since its my work. Almost all PDFs I see will not be openable even if you had the full Adobe Pro. You need more exposure on this to understand this.

As to Word to PDF, such can be free as evidence by Open Office. For cheap conversions I can save to PDF from the word processor and its free. http://www.openoffice.org

As such, you can't complain you couldn't make a Word PDF...

Bob