It's a fun toy at the moment.
I had an issue with it when, after implementing the facial recognition log on one evening when my countenance at the time was quite acceptable, my morning countenance was determined to be too far unlike me to allow a normal log in based on facial recognition alone (hey, in my defense, it was a tough night).
Thank goodness for the old password standby.
I continue to use a password log in but I still play with the facial recognition stuff because it's fun. Currently, it should not be considered as much more than that.