Cool, but there are far better alternatives to this...

This would be a great app, however Apples own reminders functionality in Mountain Lion is much better. Also, if you get both Alfred and Fantastical, you can set a keyboard shortcut to add new events and reminders straight into your calendar via Alfreds quick search bar. For me, I press CMD+Space to pull up Alfred, then I type f+"meet frank @ 12PM tomorrow" or whatever else I want and bam, new event or reminder in my calendar. Not to mention, it will be synced across all my iOS and OS X devices. Absolutely perfect.

Anoxymoron about Due — Reminders & Timers