My 12 year old son figured out that by taking a close up high resolution picture of me that he can unlock my facelock enabled Bionic. Not much security in that.
Having worked in biometrics for a few years, I just had to try it. It is a novelty at best. I also work in the IT security field so I had to at least give it a whirl. I now work in HIPAA compliance and am getting all of the usual questions from my providers. It will be fun to see the look on their faces when I show them how easy it is to fool it. Flashbacks to using gelatin with wire mesh embedded to fool the print readers.
Maybe not so great for around the house security with kids, BUT leave your phone somewhere in public, way more likely they'll be able to slide to unlock as opposed to be carrying a high res picture of YOU in their pocket.
I haven't even been able to try it so I can't comment much, but I think that was the intent. Not necessarily to keep kids or loved ones out...
I wish they would not allow a still picture but use video so that it sees your face moving, smile, eyes blink or something to that nature. Otherwise I find it quicker to use a pattern if need. Sometimes if the room is too dark it isn't going to work anyway, and then your going to have to take extra time to bypass that with a pattern unlock. It is more of a hassle to me than an advantage.