I've had the jetBook a little over a week now, and read a significant number of books on it.
Likes:
1) The Screen - Definitely the right technology, I love it.
2) Battery Life - Several days between charges; good enough.
3) Controls - Well laid out with several hand positions to avoid tired fingers.
4) Page Numbers - The recent "How Long Is That eBook" debate doesn't apply here. jetBooks give page count and %Progress. I suppose I could complain about a lack of word count progress or no character count information, but that seems petty.
Dislikes:
1) Slow response at odd times - probably due to limited processor power, slow bus, or laggy firmware (more on that)
2) Lack of features in the renderer - I miss my Windows Mobile freedom of choice for viewing software. Don't like how Mobipocket handles X; switch to microbook (or Resco View, or Word Mobile, or ...). Specifically, I don't like the lack of internal hyperlinks, for example Mobipocket tables of contents. There are some other, more minor missing items.
3) Poor font support - 2 sans serif fonts, period? Really? That's primitive. Now, as it happens, I like Verdana, and it was designed for this kind of use, so it's not a hardship, but it is a ... a lack.
Overall, it's a good device. Ectaco needs to keep updating the firmware and adding features to the renderer. In particular, they should contract someone like Gower Point to port something like microbook to the device.<--(free advice, worth every penny)
Regards,
Jack Tingle