I bought this two months ago for the holiday home we visit once per month.  The first month the wifi disconnected and I had to reinstall it.  The battery drained to 60% The second month the battery was already dead after opening and closing zero times.  In total, I opened and closed the door maybe 10 times with the code or app.    Compare this to my nest door lock that never disconnects, gets used seceral times per day and needs a new battery about once per year.  I have to return this.  Too bad.