Customer reviews were one of our earliest innovations, and many people thought we were nuts.

Why would letting people post negative reviews help us sell those products?

Because we're in the business of helping customers make better purchase decisions.

Today, customer reviews are a critical part of Amazon. Every day, customers from around the world take to Amazon to write reviews—customers can now upload images, answer other customers' questions about a product and rate one another's reviews—and customers use these reviews to inform their purchasing decisions. Here are a few that made us laugh.

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