Scans from HOL1_Manual_VB.pdf at
SharePoint 2010. The first two are using XPDF in landscape, which has full screen and landscape modes with margin cropping but does not reflow and does not support Adobe DRM. The second two are the same page using Adobe Digital Editions, it does not crop the margins. The next two are ADE with reflow, all the text is displayed but the image is moved to the end of the page. Don't forget the actual screen is only 3" by 4", and I find the landscape full page modes to be unreadable (they do give you an idea where the images are though).
Finally there are three screenshots (not scans) of the same PDF in
Sony eBook Library for Windows. These illustrate that eBL is essentially the same as mobile ADE on the Pocket Pro, except that it only has the portrait mode. So it can be used to see how your PDFs will work before buying a Pocket Pro.