Save yourself the time and headache, and don't bother. Reviews are bought and paid for at the bigger sites. Don't believe me? Wait until Fallout 3 is released, I guarantee you that you'll see nothing less than 9/10 reviews, and people raving about how it's a "true successor to the fallout games" and "worthy of the title", when pretty much all it's going to be is a lame FPS. Same with Bioshock, just another uninspired FPS, with great ratings. Or any other number of highly hyped titles. If you want the real shtick, find someone who will buy the game and play their copy for a bit, or failing that, listen to the opinions of your friends whom you trust and value/share their views.
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Need I say more?