The only problem with that is the software isn't as smooth and optimized for E Ink as simpler ebook readers. (the-ebook-reader.com)
The only downside with having software so complex is that most apps aren't optimized for E Ink in any way, and battery life isn't as good as simpler ebook readers. (the-ebook-reader.com)
For this reason, most mainstream publishers use extremely simple ebooks with no decoration at all. (diybookformats.com)