let's see what the beta test phase will bring (up) - as far as I know there was an alpha test phase where the issues of a haptic rain sensor known from the Weatherflow Tempest station are claimed to have been removed. Ecowitt also claims that their approach to haptic rain sensors in different from what's so far on the market.
Again, let's see what the beta tests worldwide will bring.
There will be comparison tests with the WH40 (and also WH65) rain gauge.
One of the beta tester selection criteria was owning a WH40 (and a GW1000/GW1100

+ ,by preference, a HP2551 console).
The beta test(s) will start end December 2021/beginning January 2022.
They will cover different geographic latitudes (it's not only a rain sensor, but a 7-in-1, so all the other sensors have to proof accuracy and fitness for the respective location and weather conditions).