Bought this lock about a year and a half ago and it was working fine.  I convinced my neighbor to get one as well and I did the install for them.  When testing their lock, it made a weird motorized sound and then I realized the battery pack had melted completely.  Everything was installed perfectly so we returned the lock for a new one.  All has been fine since.

My lock batteries died a couple months ago so I replaced them.  Today when leaving the house, my lock died.  I checked and the battery light was on so I replaced them, even though it had only been a couple months.  The battery light was still on so I checked and there was corrosion that was preventing the lock from working.  So now my lock is broken and I have to use the key until I figure out what to do next.

The lock is great when it works but it is unreliable in my experience.  I am glad I had my key on me or I would have been locked out of my house.  No happy with the experience and very frustrated overall.