[z0r]

I've found 1 star reviews to be hugely useful on Amazon. Often have seen detailed contrarian 1 star reviews for books that have nearly a 5 star average and found very interesting viewpoints. This works especially well when you're suspicious of the product being a scam - less the case for books, but very useful for other consumer products. The 1 star reviews are where people who received a cheap knock off or something that broke or otherwise failed quickly complain. I like to read the 2 and 3 star reviews as well but there's a similar amount of filtering necessary in my experience.