I love it! Installation was super easy, and I had it installed within a half hour of it being delivered a few weeks ago.
IMMEDIATE response via the super low-powered Z-wave protocol is the best part about it. I have it connected to my SmartThings hub, and I have a Rails-based dashboard it's connected to as well. Having the ability to hit lock / unlock on the SmartThings app or the dashboard, and have the lock IMMEDIATELY lock or unlock is the best part. No more waiting up to 30 minutes for the damn thing to respond to my requests.
I have some triggers in place too, so if my wife and I leave the home zone, it'll automatically lock if we hadn't locked it already, and it'll automatically unlock if one of us comes back within the home zone.
Another great thing about it is the battery life. I struggled to get the Lockitron to keep batteries for more than a few weeks. Maybe it's because I got one of the earlier ones? I don't know.. But this has been going on like a champ for 3 weeks now, and is still at 100% battery life. With an expected battery life of greater than a year (obviously dependent on the number of times you make the actuator lock / unlock your door), this is awesome!
Instant response, incredible battery life, integration with other SmartThings devices... Can't go wrong! I love mine.