I purchase this product in October and we've had a few issues with it here and there, but this last one really has me considering going back to a regular lock with a key. 

My fiancé and I came home from an evening out and tried to unlock the door. We found the keypad lit, which was odd, but what's worse is that is was unresponsive. We sat outside for an hour to let it reset, and nothing changed. We ended up jumping our 6' privacy fence, and crawling in a window to access our home. We relied on the lock so much that neither of us realized that we weren't carrying our house key. 

We've also replaced the batteries twice since we bought it 5 months ago. When it operates properly, it is very handy. But when it goes out, it can cause an issue like the one we experienced.