Apart from the fact that the constant Bluetooth Connectivity empty sucks the smartphone literally, it is with me so that my phone for weeks no longer bothered because I did not have a key here. Sorry! Because the software is well thought out and if it works, then really good! You get a pretty good overview where the key might lie. Although the radius, varies greatly depending on local characteristics.
in my case I find anything after a brief troubleshooting: The battery always jumps out of the receiver making it useless in one fell swoop! A small piece of paper between the battery and Case can do better, but it works but only sporadically.
