I'm on my third WS. The touch screen failed in my original after a few years, so I replace with the same model but solar charging on the external station, then a little while ago either the TX or RX failed. No matter what I did I could not get comms back, so I bought my third which is running perfectly on a mix of the original and 2nd generation sensors and the new TX and internal receiver. So I have plenty of spares.
I'm currently running the 1st generation wind vane. The bearing has jammed a few times on mould or fungus or something, but is cleans up OK. The second gen wind vane had the bearing fail completely - jammed solid, and fell to bits with a split ball in it when I tried to free it. I've never seen such a small lightly loaded bearing element fail like that before!
Other than that, they are great units for the money. Just need to be aware that like any weather station, they need a bit of maintenance from time to time to stop the spiders from tying the rain tippler up so it doesn't keep them awake at night, etc.
Al.