SEATTLE--(BUSINESS WIRE)--(NASDAQ:AMZN)—Seven months ago, Amazon introduced Echo, a new category of device designed around your voice. Echo was available on an invitation basis to customers who wanted to help shape the device as it evolved. Here’s what reviewers are saying about Echo: “A Perfect 10” – ZDNet “The Echo is one of the most compelling cases I’ve ever seen for the power of voice control, of talking to our gadgets the way we talk to each other.” – The Verge “The Echo is Amazon’s lates