I have had mine for years and love it. Having lost my wife, I wanted something my grand kids could open and not have to deal with a key. They have misplaced their own house a lot. This they have no problem with. I do not have to remember the code. I remember the sequence of numbers according to their location. For example, there is upper left (UL), lower left (LL), Top (T), upper right (UR), and lower right (LR). I remember to press, for example, UL, LR, T, UR, UL, LL. Those who are mathematically challenged can remember the sequence like that.