I had to sign up with a secondary email because I never received a confirmation to my primary email nor any error message or warning, just failed to arrive. I couldn't get email module to work. I sent some test emails, they never went through. Could be user error. The email section of help doesn't have any tutorials yet. Sync only one Google account/calendar, which would be a deal-breaker for me (free tier issue??) I think this is going to be a very good app as it matures. For now, a few too many bugs for me to rate it positively or negatively. Just a bit of limbo.
Found 2 bugs during my test and they got fixed in minutes. Really looking forward into what will come! :)
Its a very easy to use product. Intuitive and no need to a tutorial