I just got a Kindle DX2 (i.e. graphite model) 2 weeks ago, and it's fantastic.
It's not a perfect device, but I knew the weaknesses prior to buying the device. When compared to an Apple iPad, the OS and user interface is really clunky and slow. This type of device should be touch-screen, as it feels like the most natural way to navigate a touchscreen. There's even a Sony E-Reader with a touchscreen, but unfortunately, it doesn't have the same image quality or clarity. The good thing is that the buttons on the side are just as good as the iPad for tasks such as turning pages, which is the most important part of a UI for an eReader, no?
I should also mention that I didn't purchase the Kindle DX2 specifically for reading books. I have 2 books loaded onto it (Eating Animals, and Green Metropolis), but reading books was not my main intention. I purchased it to read and store PDFs --- LOTS of PDFs. I currently have around 50 PDFs loaded onto it, along with the 2 books. I read PDFs from scientific journals, international protocols that we follow at the hospital (where I work), product manuals, and other work-related documents. My Kindle is brilliant as a storage facility for my documents, since I can't keep 1000 pages of documents with me at all times. This will be useful for train trips (I commute to work every day), on vacations, etc.
The Kindle only uses battery power when you change pages, and based on how much information is packed in my PDFs, the Kindle DX2 will probably last me 4-6 weeks before I need to recharge!! With any LCD device, I'd have to worry about battery life during a long reading session. I love how the Kindle is so free of hassles.
The Kindle DX's screen is far superior to that of the iPad, Android mobile, iPhone, or any tablet computer or laptop screen for reading documents and books. This is where the Kindle shines, and LCD screens fail. Unlike LCD screens, the Kindle screen gets better as the amount of light in your environment increases. LCD screens are the opposite, as the screens get worse as ambient light increases. I'm much more likely to read in a lit room than in the dark, so this works out well.
The screen is exactly like paper. Really. Also, it's smudge-proof, and I haven't seen any glare whatsoever from normal indoor or outdoor use.