Just the spell check alone is worth the money.
As far as I know, there is no other PDF application nor plug in can really spell check the actual contents of the PDF, not even Acrobat itself. All others product claims to preform check can only check the “Comments” field.
Some even suggest to go back to the original document file to run spell check there. Which is unpractical as most of us receive PDF file without the access to the original and we need to spell the PDF file.
All the other features in Infix [are] just as good as Acrobat if not better. The “Contents Text Box” works well for extracting text from various part of the document and replace back to same file. Good for contents requiring translation.
A time saver for this type of task if you need to have a few rounds of translation edits.
– Kanam Ngan