[JohnDae]

I make some observations based on couple of weeks of experience with modern e-ink e-paper E-reader device.

Generally, the readability is much better than other display technologies but still ways off from ink on paper.

First, the 'white' is gray which means much more light is necessary to read compared to white or creamy yellow book paper. This often means I have to setup special lighting to read whereas a book would be fine as is.

Any extra lighting, however, adds to discomfort especially because glare is a big problem unlike with book paper. The glare is comparable to or even worse than anti-glare coated monitor which means everything light and especially all light sources show up as bright semi blurred reflections. This means I have to hold the device at a specific angles depending on the surroundings for a glare free reading experience whereas diffuse book paper is essentially glare free. It doesn't help that the glare highlights the fact that the letters reside under a few millimeters of coating with smudged surface from using the touchscreen.

The two above mentioned problems (lack of whiteness & glare) are the same fundamental issues my old reflective frontlit LCD reading device suffered from, however both aspects are greatly improved.

Finally, the PPI is completely sufficient for reading but, aesthetically, fonts look somewhat pixelated when not using anti-aliasing or blurred when anti-aliasing is being used compared to most books. The PPI would probably have to be increased to around 1200 or even 2000 to get comparable font quality.

For future versions of the technology, I hope developers concentrate on improving the whiteness and reducing the glare for even better reading experience.