In my experience they're more open than Kindles by default and there's no need for jailbreaking. I can read PDFs, project Gutenberg epubs, library books, sidelo

In my experience they're more open than Kindles by default and there's no need for jailbreaking. I can read PDFs, project Gutenberg epubs, library books, sideload via Calibre and so on -- but maybe someone else has other needs that require a jailbreak? Not sure. The hardware is good. I have a Libra Colour, which works great. Good screen, waterproof, nice hardware buttons to page-scroll one-handed, a good bezel to hold onto. No complaints from me about it.