Purchased this electronic deadbolt after my electronic door lock failed from a competitor due to the electronic actuator movement of the plunger / deadbot during door and fram miss alignment... i saw this lock at an air b&b in florida... user friendly, easy to program, sturdy, and reliable because the user turns the lock not an actuator that can break due to miss alignment of door and frame... the user controls the alignment and the movement, therefore a lower chance of miss alignment and no actuator to break...also worked with existing door latch from my old set.