I have a couple of smart devices, and a couple of the features are useful. Being able to shout "where's my phone?!" and have it start just ringing is super convenient. Being able to set quick timers, especially when I'm cooking, and don't have a free hand is nice. And I've set up one smart light switch in my garage; the switch is in a spot that's not near any doors (its technically over a workbench), and its difficult for my wife to reach, so adding voice controls to it makes it actually useful.