One thing I noticed early with this kind of display is that it does not do well with the yellowish lighting we have been accustomed to use.
You have to spotlight it with a compact fluorescent (CF) bulb. And in the process try not to light your hands, they will have a tendancy to be brighter than the screen; uncomfortably distracting. My favorite reading setup with it involves a cantilevered floorlamp with a CF in it right over the center of my head while in an easychair, with a lounging cover and two cats on my legs.
I've tried it next to a window in direct sun. At this it is the best ever outside reading experience, even more than paper, which becomes too bright and better than any edisplay available.