I'm surprised I haven't had an answer to this. I thought I was the target market.
This looks like an inferior web based edition of Exchange/Outlook functionality. It was a serious question - is there an advantage to using this? If not, you might need to do some market research to better target the problem you are trying to solve.
From the short presentation on the home page I did not get the impression that you (a current exchange/outlook user) are the target market, actually. (But I could of course be wrong or we got a different branch of an A/B test)
I think the examples are pointing in a different direction, i.e. a simple and straightforward tool to help you juggle daily life with a focus on spontaneously rearranging tasks, rather than fixed business meetings and scheduling events for teams even.
This looks like an inferior web based edition of Exchange/Outlook functionality. It was a serious question - is there an advantage to using this? If not, you might need to do some market research to better target the problem you are trying to solve.