Well, I've been hyper-careful with my Sony 505, so I can't say whether it's fragile or not. One of the things that decided me on the Sony over the Kindle, though, when I was researching the purchase, was that the Kindle felt flimsy. The Sony felt more like a serious piece of electronics in my hand (the steel case no doubt having a lot to do with that). So, that's another direction you might want to look.
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