I worked in this space and personally digitally signed hundreds of documents, using Entrust and FoxIT (Adobe Pro could be used too). I've found sometimes that

I worked in this space and personally digitally signed hundreds of documents, using Entrust and FoxIT (Adobe Pro could be used too). I've found sometimes that Preview mangles some PDFs created in Adobe. In addition, there are many cases FoxIT (PhantomePDF) also mangles or can't even open PDFs that are *complex in nature that were created in Adobe Pro. To be fair, I just signed some bank documents, and it was all inside their system and it just consisted of me checking a checkbox. It was their system, so it was considered a signature, since I logged into their system first. Once you get into power usage, such as redaction in the legal world, Adobe is the only product that doesn't have bugs. I've tried. It's a sad state of affairs, but yeah that's the world. *And by complex, I mean 1GB pdfs with 1000s in pages that have Adobe's embedded audio/video as well as scanned handwritten notes and photos., not 1 or 2 simple pages.