We've been using the Smart Code 909 for about a year, and not only was it easy for me to install, (it was as simples as a regular doorknob) I am so glad we decided to purchase one. We never had an "electronic" door lock before, always used keys, but this is really great. I mean, it makes sense - we have a keypad lock on the garage, that we used to go in and out of the house all the time - why not get the same for the front door? It's easy to use, we all know the code, nobody worries about forgetting a key, or ever being locked out. And, I can hear when someone comes in the front door now, as the buttons beep when you press them, so I like that little bit of aded security too. I am so far happy with the quality, as I have had no issues, no problems etc. I think that after having this electronic deadbolt, I will never go back to a "regular" key lock on the front door again.