I no longer have an eInk because the latest round of tablets have much higher resolutions and higher pixel densities. The only good situation for eInks is when you are in a very brightly lit area, mostly outdoors, where tablet screens will get washed out. I rarely read outdoors so I don't miss an eInk.

I read hundreds of books on Palm, Sony, and Treo PDAs way before eInk was around. EInk screens are definitely better than the LCDs on those old PDAs were, but the latest LCD screens have far surpassed the eInks.

I mostly read on my iPad Mini Retina via the Kindle app and Marvin. My Nexus 7.2 is also good for reading, though I prefer the better Kindle app on iOS and I prefer Marvin over all the Android and other iOS reading apps. Otherwise, text rendering and reading quality is about even on these two devices.