Overall very good, couple small things could be improved
The build quality is exceptional. I am using one integrated locally with Home Assistant and another one in a different house using the Shelly app. Both ways work great. Sensor reaction time is good. I like that it uses a moisture sensing cable instead of a puck style sensor. I also appreciate it including a short cable extension so you don't waste your water sensing cable going from the device mounted on the wall down to the floor (nice attention to detail there). Things that could be improved: Provide a way to power with 5v USB input for users with power nearby. However if the 4xAA batteries last long enough, this might not be worth the extra expense. The sensor cable is very stiff and is practically impossible to get to lay flat. I have used some more flexible cloth wrapped moisture sensor cable on some of my DIY sensors that works a little better in this respect. The cable provided with this is easier to wipe off to deactivate the alarm than the cloth wrapped stuff.
