I have both a Nook STR and a Sony PRS-T1 and I think that the Sony screen is much more readable. I find the Sony to be clearer and especially better in that the print spacing is not squinched vertically in the Sony as it is in the Nook. Yes, while the Nook supposedly has a vertical spacing control, it does not work too well with many of the ePub books that I have. One more reason to detest ePub. Sony, PLEASE bring back BBeB, it was SOOOO MUCH more readable.