Basically is just the same as my Gen 3 which I have had for 4 years and is now failing and I read a lot so it did well. The opus is a lot smaller so fit in one hand really easy. It is not a touch screen or wireless (which I did not want as I tend to read and eat my lunch which would result in a messy touch screen and it not being wireless means I can save money and only buy when the unit is docked to my laptop). It works fine with calibre and apprentice alf and come loaded with software to read Epub but you can downlad firmware off the bookeen website and using a micro SD card change so it can read mobi. But it is either mobi or epub not both at the same time. On the plus side it is also E ink and really easy to use. Basically it is just a Gen 3, but smaller and wont play music (but who want and ereader for that !!!!!)
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