It's lightweight, easy to use, connected, readable in any light where you can read a regular book. I'd be happier if it were a little bit more affordable, but hopefully that will come over time. I suspect without proof that the life-time data subscription has to be a big chunk of the cost, and possibly the cots for what I believe is the underlying patent, originally owned by MIT. I read about this patent and research several years ago, and believed it to be the most likely path forward for readable ebooks.
Go see for yourself: http://www.amazon.com/gp/product/B000FI73MA/?tag=httpwwwpain03-20
Shucks...this isn't working right. Here's the direct link....this was the trek that Red and Eddie took when they escaped several months ago.