Echo Users Manual: Get Your Money's Worth From Amazon's Echo

Amazon has delivered a home run with the Echo, a voice-command device that plays music, answers your questions, and adds things to your grocery list just by listening to you. It's an always-on personal assistant and the first such device that's simple enough for the average consumer to begin using right away, without any technical knowledge.

Although it's a relatively small cylindrical device about the same size as two stacked soup cans, Echo delivers impressive sounds-lifelike speech and full…