Great tool to use your ebooks on any device
I originally purchased a licence to read my purchased ebooks on any of my devices (Kindle books are locked to my Kindle, etc.), but I've since discovered that I could convert ebooks from one format to another as well. This is a big deal for me as I can now choose the formats that work well for me. And now, I've discovered that I can edit the metadata of the books as well, which helps me organise them neatly. Fantastic!