I now have a longer more secure pin and only occasionally have to enter it. It is quicker to scan than enter but was similar with 4 digit pin.
When only one hand is free iris is much more reliable and quicker than password. Also on 950 XL with small hands so much less chance of dropping.
It's not slow. https://www.instagram.com/p/-hqPGNINks/
I use it all the time. I also took a few minutes to train it.
The thing that bugs me the most is the small field which the scanner scans your eyes. Also while driving it can be dangerous trying to look at your phone for 3 seconds. Microsoft should let camera view your whole face to scan your eyes
Iris scanner is a win win. I understand its slow, but it works juat fine. Lower the light, better it works. Sometimes keyboard gets stuck or wont show up to enter the pin. In that situation a person wont b left wid too many options but restart the phone. I can just b patient and stare at the red light and phone unlocks. Its safe and secure. Iris scanner cant b cheated, which is slowly embedding into other apps like onedrive to start with. Iris scanner is gud to have with other windows apps too. My other hand is bzy at times and the hand holding d phone isnt that big, iris scanner works for me in every situation.
Iris has got nothing to do with battery life. It's a myth. Iris is always quicker for me than entering my PIN number.
The Iris scanner is somewhat awkward to use. I mainly have turned it off to prolong my battery in my 950XL