I wont ramble on about the technical items here. I'm a gadget freak, always have been, and this is a seriously cool piece of kit. I am also pathalogically incapable of throwing books away and my house is not all that big so I seriously needed some way of not filling the house up any more. This thing looks really cool and works really well. For reading the screen quality is excellent. It's pretty cool for photo's too (nice to see them in black and white).
If you buy one of these and don't like it, I think you have missed the point of what it is and what it is for. There is more content out there than you you could ever read and certainly if you travel (or even if you dont) this is just the best thing since the iPod. Buy one, you'll love it.