I once had a terrible experience with their kindles. They shipped me one that was a dud, and when the screen went haywire in the first few days I called and they admitted that this batch had issues. Unfortunately, they told me, I would have to shell out 100$ for a new one, even though it was their fault.

Even Amazon screws up royally, too. I bought a Nook and never looked back, and haven't bought a book from Amazon since.