Comment on PDF Image Extractor

Twenty dollars?
Most of what this app does (is not all) can be done FOR FREE with Preview, which comes with Mac OS X.
And there are quite a few free apps that do just the same, like PDF2Image, for example:
http://www.macupdate.com/app/mac/26885/pdf2image
(And no... I'm not the developer of PDF2Image. I'm just an ordinary user.)