>> 1) How responsive is the UI? There's no excuse nowadays for the GUI not
>> to change instantly when you press buttons.
>
> There is a reason. The Electronic papers used have a very low refresh rate 
> and ghosting can occur. My Sony flashes black then white to overcome this, 
> slowing page turning down even further. Having said that I find it 
> acceptable.

I meant more that when you press a button, there should be some instant 
feedback that you actually pressed it (I understand due to the low power 
screen technology used the refresh rate is going to be slow, but there are 
ways around that like you mentioned with the black/white flash).  There's 
nothing worse than pressing a button, apparently nothing is happening so you 
press it again, only to find the system registered two presses of the button 
and you need to go back.

> Mine has a resolution of 600 x 800 pixels on a 6” screen, 8-levels gray 
> scale, fits in a jacket pocket and although a bit reflective can easily be 
> read under artificial light or bright sunlight.

What about low light conditions?  Is it comfortable to read in the dark with 
just a bed-side lamp or similar?  I'm guessing it doesn't have any lighting 
of its own to keep battery usage down?

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