Screen doesn't flicker between pages. The level of contrast is easy on the eyes. I can read in a range of light levels. Its easy to turn pages (or set auto turn). Reads a number of formats. I love that I'm not tied to a few propriety formats.
The only thing I don't like is that after the last firmware update it does stick sometimes after charging.
I love it. Its easy to read, easy to load, uses a variety of formats and is very sturdy.