You can also ask Google Assistant to cast the doorbell's live video stream to a Chromecast equipped TV. This even worked with my first generation Chromecast, although it took some buffering as all video tends to do on a first gen Chromecast. If you've subscribed to Nest Aware, you can even have your compatible smart speaker announce people by name, assuming they're recognized by the Nest app. I'm a reluctant smart speaker user, so I found this weird at first. But it's also the closest my house has come to the McFly house in Back to the Future Part II, welcoming home every family member by name. The Nest Hello also works with the Nest X Yale smart lock, so that you can lock and unlock your door using your smartphone and assign codes to guests. However, you can't use your voice to control it with Alexa or another voice assistant as you can with August's and Schlage's smart locks. MORE: Know Where Your Kids Are With These GPS TrackersWhile some Nest products such as the Nest Learning Thermostat, Nest Protect smoke alarm and Nest Cam have IFTTT support, as of this writing, the Nest Hello does not, although some Nest Cam recipes do work. Nest Hello's facial recognition seems like a natural fit for this kind of automation — imagine setting different rules for different people — so we hope it comes along eventually. Bottom LineThe facial recognition feature in the Nest Hello gives this video doorbell a more personal experience than the competition. In addition, its quality HDR video, strong speaker and microphone, and well made and frequently updated Nest app were tops among the other video doorbells we've tested.