This is not going to be a comprehensive review. But I feel the need to comment on this application. I have been using PDFClerk Pro (and the non-pro version) for a couple years. It's a great way to assemble a PDF file from lots of different files. I upgraded to the pro version a while back partly to show my support for the company but also because I wanted the ability to add my own annotations (text boxes, highlights, shapes, etc) to existing PDF documents. I also looked at a product called PDF Pen, but comments about support problems scared me away.

PDFClerk Pro has done everything I have asked of it. It just works! I believe I have only begun to scratch the surface of this program's potential. There are many features I haven't yet explored. For the user who wants to assemble PDF's from files of varying types and the user who wants to annotate existing PDF's this is a great program (and less expensive than the $449 Acrobat Pro!).

THE BEST PART: The thing I like best about PDFClerk and PDFClerk Pro is the exceptional customer support. There are so many bad customer support experiences every day in this world. SintraWorks' António Nunes provides extraordinary support. Use the SintraWorks suport forums. You will receive a quick answer to your question. The answer will be complete, well thought out, and easy to understand.]

Nice job!!

IN SUMMARY: The program is stable and works well. The support is excellent.