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There's a saying that goes something along the lines of "if you've not got anything nice to say about someone, better to say nothing". Never before have I seen that principal applied so thoroughly to an autobiography. I'm not saying that's necessary a bad thing, but I did feel a little short changed on the whole Nirvana story. People close to that story (such as Courtney Love) were a little conspicuous in their absence.
That minor gripe aside, it's clear Dave has lived a blessed life and has taken advantage of many of the amazing opportunities that came his way. Ultimately, you have to admire him for that.