I'll argue with @aaiyar and say that it works very well. 
As he said, use @bcopeland's wonderful driver: https://community.hubitat.com/t/release-aeotec-water-sensor-6-w-dock/39292.
I have one with USB power in the dock, and it has performed flawlessly in the short time that the driver has been available. It reports temperature and battery regularly and signals water very quickly. I'll buy a couple more to go in places where I can utilize the combo of the dock, remote probes and USB power.
In battery, no-remote-probe applications, I use Fibaro Flood Sensors. https://www.amazon.com/FIBARO-Sensor-Detector-FGFS-101-ZW5/dp/B01H1M0SP6
They don't get a lot of love on here due to the price, but they are solid. They report quickly and regularly and just sip battery life. Perhaps if I had more of them, I might chase a better value, but overall, the cost difference really isn't that much. I had a non-plus/300-series on ST and it was equally solid, so I bought the 500-series to go on HE and haven't been disappointed at all.
