The Calendar-Reminders integration is SO welcome - game-changer for me. I switched back to Apple's Calendar and Reminders from Fantastical a couple of years ago and really missed this. Reminders alone was a bit clunky because I had to clutter my Today list with items from other lists just so I could keep them top of mind, and then had to go back a forth between the two to keep my day going smoothly. Now I can use Calendar and see both appointments and reminders for the day. Terrific.