I just got my first real water leak alert. I have two hot water tanks side by side, sitting in trays in the attic. One sprang a leak late this morning (and not a slow leak either) and my ST water sensor did it’s trick. I got a voice notification on all my Sonos, lights turned on and my phone went crazy. Water is off and the leak contained to the tank tray and a plumber on the way (I have a home warranty too). Last time my tanks leaked they overflowed the trays before I noticed.
Feeling very relieved right now.