Well, the Met Stat thing is interesting. Those people have a professional, young staff of engineers and meteorologists that put out a complex measuring formula.
I would like to just have their raw estimate of how much rain I got as a baseline to check my other gauges. With Rain-Check, I guess that is basically what I am getting, so I can look at the WF at least as a paid subscription to their analysis.
The WF UV and brightness are a nice addition to my weather data, and there is not much reason to suspect the "Air" part of the system. My Air sits in permanent shade on my back deck. It is nice to know that it's not as cold at night or as hot in the daytime as my aspirated, shielded Pro II sitting up on the roof at over 25 feet.
My "Sky" is too low and between houses has little chance of giving me accurate winds, so I can't judge it. But it should get ballpark rain totals, better than a 25 feet up tipping bucket. But I guess Rain Check is the only way it can do that. I should keep track of Sky's raw rain total compared to it's RC adjustment bumps.