Also, ePub 3 is only supported using
the kepub reader.
Full justification works properly (
kepub reader doesn't properly justify some lines that contain certain common characters such as ellipsis and emdash)
Better hyphenation (
kepub reader can hyphenate words in the wrong place if they have trailing punctuation)
Not exact matches
You can simple copy e-books files to
reader without any external software (I prefer Calibre to do that, it convert any format to more recommended
kepub but it isn't required)-- e.g. in Poland most online bookshops doesn't used DRM protection (only watermark) so you not need to worry about.
In the meantime, there's a link in the ETA part of the above post which goes to The Digital
Reader where you can find a link to Calibre plugin which works with the Kobo Desktop app to convert
kepub books into epub.