The Kwikset SmartCode 917 Residential Electronic Lever has been a great upgrade to our door. 
We needed an upgrade with a Code system and found the Kwikset SmartCode 917. 
This allows us to have a keyless entry with a keypad. It gives us the security of having a code entry. The SmartCode also has the highest ratings in security, durability, and finish. 
There is a lifetime mechanical and finish warranty and one year electronics warranty. It was also extremely easy to install and set up. No wiring needed! 
I am extremely pleased with the modern look and sleek design. Thirty user access codes that can be customized for sharing and also being reversible for left/right hand doors.