I have been a customer of Epubor for years, and have been very happy with the software.  I do hundreds of book reviews, and the galley that I review them for changed and started to require that I go through Thorium Reader, which is absolutely the worst software on the planet,  I used Sososofty (part of epubor)  to convert my new  books.  The team  always responded quickly and answered my questions, even though I am not computer savvy.   I have been very impressed with them.  

When my subscription expired, I purchased the new Bookwalker Mate to convert the lcpl and epub downloads, and the software is extremely easy to use and works perfectly.  I plan to use them often to convert the pdf books, but hope there will be an upgrade when the software can convert those.

I will easily trust this company with any software they develop.  The customer service is extremely good.