I changed my initial rating. I might change my mind based on how well the manufacturer will deal with issues. 
1. First lock cake damaged. I got replacement and it worked perfectly, until...
2. Time change screwed the history. I could see that someone went on and out but could not see who, until several hours later. 
3. Yesterday, the lock stopped showing notifications and could not activate it remotely. 
4. Customer service is useless and clueless. I spoke with two different reps, both have me totally different answers about updates, upgrades, and supported phones and OS.