One other great thing, you can change the font sizes and there is no glare (it's crazy technology, not like looking at a backlit computer screen or cell phone. It's more like an etcha-sketch. THe letters just sort of appear.)
It also always goes right back to the place you left off in the book, which is great. One thing that took getting used to was it doesn't have page numbers because it depends on your font size and what not, but it does give you a percentage completed. It didn't take long to get used to but it used to annoy me. Now, I am fine with the % done.
Okay, enough raving about it, but it just goes to show you, they are really cool