The snapshots are extra handy when facial recognition is wrong — which didn't happen often, to be fair. First, the app asked me to identify my family and close friends multiple times from photos the Hello took. You can do this for anyone who comes to your door. I tagged my husband four times, for example, and my son six times. In the Nest app's Familiar Faces gallery, you can tap Select, choose all the instances of the same person, and tap Merge to combine them. After that, it worked pretty smoothly, but it did misidentify my husband one night as my son's best friend, a 6 year old African American boy who wears glasses. My husband is much taller, a lot older and Caucasian, and does not wear glasses. I also wish the Nest Hello used facial recognition a little better. There's no way to exclude certain individuals from triggering a notification when they're recognized, for example, and I don't need the app to tell me that it's me who just arrived home. MORE: Amazon Cloud Cam vs. Nest vs.