So far so good. Took me 3 hrs to calibrate just because I was turning the lock too hard so the machine thought my door was always not lock completely. But that’s just because I turned too hard during calibrating. For a old house, it might took some time to install. But! Amazing features and such. Feel pretty satisfied. 
However, it can only use 2.4ghz internet because it needs to battery life efficient. In order to use 5ghz internet, u need to separately purchase the bridge. That’s very stupid. You are basically just reducing a product’s feature. I bought this lock so I don’t have to have a separate WiFi bridge, but it turns out, in order for battery long life, u still need the bridge. For me, this WiFi smart lock is not a new product, it’s just a reduced feature lock but for higher price.