I took some quick snaps of your attached pdf. Didn't have time to do the same for the linked file.
Sorry for the poor quality, but these were taken hand held in poor light just as I was about to head out the door... they're not a good measure of the PRS-600 w.r.t. reflection/contrast/glare, etc.
Portrait orientation (zoom):
Portrait orientation (zoom reflow large):
Here are a couple on a cropped version of your pdf.
Portrait orientation (cropped pdf):
Landscape orientation (cropped pdf):