I know some folks believe reviews don't matter. Obviously, what I do as best as I can, leads me to believe reviews do matter. Not two sentence reviews that boil down to "Best Book Ever!!" or the flip side of that. No, the reviews that matter are reviews that have depth to them and have a foundation regarding the book. Love the book or hate the book, but be able to explain coherently why.
Take a look at http://thegenreview.com/ run by Tony Burton. Lots of good stuff there and well worth your time.