Too buggy  I am on SM 910A no root android 5.0.1 No security was set when I let the display lock. Unlocking did no happen on swiping   or scanning finger. Then suddenly screen unlocked after 15 sec. But menu key did not work. After force quitting app using working keys from recent tabs and kill all and removing app from device admins finally could start using touchscreen menu/appdrawer key. Please work on it. It has got potential. I will be looking forward to changing my rating soon :)
October 07 2015