I only turn towards reviews if i'm thinking of buying a game or if there's two I want to compair to see which is best. I tend to stick to reveiws from IGN, the seem to cover more than other sites do (this is asuming you meant online reveiws).
From experience they do quite a good job. I've bought about 4 or 5 games after checking out the reviews and there's been no regrets. That said, I usually buy a game a few years after it's been out so I haven't read a review for any new titles.
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