Amazon Echo Plus review: Alexa, is this all you've got?

Amazon's new $100 Echo is a disappointment for anyone who looking to upgrade from the original model. Sure, it's nearly half the price, but its sound quality is also significantly worse. With that in mind, the $150 Echo Plus seems like a far better successor on paper. It features better speakers and a built-in smart home hub. It's still not a must-have upgrade -- a testament to how much Amazon got right at the beginning -- but it at least offers some improvements over its predecessor.