I finally bought a Tempest at the end of last year. The wind sensor went bad, so they just replaced mine. Otherwise, the wind readings are pretty good. I've been told my temp/humidity/DP readings are better than my VP2. Rain readings are a bit wild, but I had them calibrate them using my VP2 and local CoCoRaHS readings. Lightning alerts are nice, as are the "it's raining" alerts and the hourly forecasts.
I'd still recommend a VVue over a Tempest if you need a tried and true weather station or if rain amount accuracy is important. I still like the Tempest as a comparison to my VP2, and the lightning alerts, "it's raining" alerts, and forecasts make it worth the price to own for me.