This is cool, but no way am I granting access to a years worth of calendar. I like how they describe their usage and that they auto remove access. But even if I believe them, there are many errors that would expose hundreds of email, contact info, and docs. I wish they had a scrubber utility I run and can remove unnecessary data. They should not need pii for their stats.
I know everything has to be an online web "app" these days, but the privacy concerns could be completely eliminated by simply making this an actual computer program.