In case it helps anyone, I have installed 4 Holfuys in the Sunshine Coast area. I initially chose the recommended Ultrasonic option for the first 2 installations (ATMOS IIRC) , ironically as I was looking for a low maintenance reliable option and have had success with ultrasonics before. I found that both of them cut out often and particularly when it rained. I eventually got a refund from the manufacturer as they are not fit for purpose (outdoor installation). I retrofitted the basic Davis rotating cup anemometer and they have been reliable for a couple of years. One of the four Davis units in operation stopped reporting and was replaced under warranty by the manufacturers, and have had no further issue since then. One of the four solar panels stopped charging on the Holfuy and I was sent a replacement for free. All in all I would highly recommend Holfuy, their service has been fantastic from start to finish.
Also I recommend the Holfuy App if you have a few gauges nearby,
if you add favourites in the right order you can see your wind at a glance.