Since I have ABBYY Fine Reader, I run the PDF through it, and then save it as ePUB or DOCX. The problem with conversion from PDF, sometimes the double letters got lost. Like the word WALLFLOWER. Sometimes it will come out as WAL FLOWER. The other L is missing. I've dealt a lot of PDF conversions, thru calibre and epub, but I found out that using ABBYY to "ocr" the PDF is much easier. Very minimal cleanup needed or nothing at all.
