When I first heard of the Amazon kindle, I knew that similar products would be introduced. Recently, I was about to use one of my relative's Barnes and Noble Nook. It runs on the new Google Android OS.
My first thoughts about the device was that it was incredibly slow. It takes more than 10 seconds for a page to redraw itself. The controls are fairly easy to use.
Just my first thoughts. Will post more when I have use it a bit more.