Well I've been reading on my Jetbook for about 6 months now.
My wife recently bought the new Dan Brown book in Hardcover, devoured it in 2 days, then handed it to me.
I got to chapter 14 before I got tired of holding it, and went out to find it in Ebook so I could load it on my jetbook.
An hour later I was back sitting in my comfy chair, reading it the way I prefer. On my jetbook.
I'll never go back to paper. I can read more comfortably, for longer, with less light than with a paper book. Not to mention being able to change font size's at will.