I would also expand it and mention that PDF reading is pretty terrible. I tried the built-in reader and all of the paid applications. Only one of them, ezPDF, was even able to decently render a two-column ACM paper. And that one had page turns only slightly faster than my e-Ink Kindle Keyboard, and the Fire became hand-scorchingly hot after just a few minutes of using it.
He also didn't mention it, but the device doesn't feel very nice in the hand. Despite the presence of a plastic back, they didn't make it "sticky" enough that you could lightly hold it and not worry about it slipping out due to its heavier weight than the e-Ink devices. So, in practice, you have to be just as careful while holding it as you do with the toe-seeking iPad.
The only thing that worked well was the Crunchyroll app, which streamed and displayed asian video content quite handily.