My coworker has one. He likes it - and from what I've seen of it, it's pretty cool. No glare screen, the fonts are readable, and you can look at the page without having to hold the book open. While I don't need to spend $200 on something, if I had $200 extra, I'd probably get it.
I have not used it but it sure looks interesting. It shows you can download 3500 book and has darker fonts without glare.
also it can connect to internet with 3g wireless without contracts.
it looks promising
missy