I have the Ecowitt WS90 with a gw2000 hub which has been solid since I installed it Mid July of this year:

This is from Home Assistant and (Yes it says the rain state is WET It's either that or dry, a very binary state on the sensor) I live in the PNW where it mostly rains this time of year so the totals are pretty accurate. It uses a Rain Piezo which works by converting the mechanical vibrations caused by raindrops hitting its surface into electrical signals. This process allows the sensor to detect rainfall. I've been toying with the idea of getting a manual rain gauge to confirm the totals, but I'm happy with it so far though!