It is awesome...
I wasn't sure whether or not I was going to like it, but after my initial reticence I have fully embraced it. All my books are now bought for this. I read the paper on this. I read pdfs and journal papers on this. It is my little friend.
It is not an iPad.
It is not a laptop.
It is, like the iPod was for music, the quintessentially perfect reading device. It looks like a book, acts like a book, holds many books. The whispernet is fabulous - literally turn it on just as I get to the tube (underground, no reception) and the paper is already there!