Considering that they appear, like other products before and after, to illegally use calibre as their backend to convert stuff, it is a surety that they will never be
better...
http://www.giveawayoftheday.com/ulti...comment-549393
Gee, what a surprise. The paid ebook-converter-and-all-in-one-DeDRM program that casually rips off Alf's work and sells it, and recommends you steal library books, is also in violation of the GPLv3 because they rip off calibre too.