I bought this unit while it was on sale to see how it would work. To be honest, I don't know if I would have purchased it if it wasn't on sale. I got it home and installed it on our dark oak front door. It was a breeze to install and I was very shocked at how simple it was to program. Everyone at our home (4 of us) has easy access to enter the house without having to fumble for keys in the dark (it lights up at night!). I actually went back and bought more even after the sale was over and put them on other doors and on my rental house! Excellent product!