On LGG4 w/Lollipop 5.1. It has a lot of potential. Like others  I've found several bugs that compromise security. I am sure developer will update soon. One recommendation: it would be great if the lockscreen option would actually lock phone after a set lock timer  then a numerical code  pattern code or tap code (LG G4) could be used to unlock after swiping the AcDisplay screen. For periods of time under the lock timer  the screen would simply timeout and as usual and user would be able to wake the phone by swiping on the AcDisplay screen.
October 19 2015