I’ve only been using PDFScanner for about 24 hours, so I’m giving it 4 stars subject to adding a 5th. I purchased this software because the native scanning software was making fat, bloated PDF files. Anything over a few pages long was too large to send via regular email. I got this software and as soon as it installed, I was scanning from my Epson GT-S50. I tested on a 103p document which scanned just over 4MB. Before PDFScanner, the file might have been 40MB.
Caveat: As of October 19-2016, I have only scanned a handful of documents, but I have had 2 strange occurrences—both involving blank pages. I did not see a double feed scan error nor did the page appear blank while in the native PDFScanner screen, but upon saving the PDF, I had 2 documents with blank pages. On one the first page was blank. On the other it was about half way through. At this point it could well have been a scanner feed error, so I’m reserving a star until my testing is complete. I have started paying strict attention now, and will revise this review one way or the other.