I installed a punch code deadbolt on our front door. It has been a life-changing experience. I need neither phone nor keys and never worry about being locked out. I just have to replace the batteries every couple years.

One of the biggest improvements, not offered by the Lockitron, is the lack of needing to fumble in your pockets for anything. If you've got a handful of groceries, it's much easier to shift a bag or two to get a hand free and punch the code than it is to go digging in your pockets.