Rated 3 out of 5 stars

Would be a four star if it worked 100% out of the box for me, but for some reason tasks to not show up in the calendar nor the tasks pane.

Would be a five star with some additions:
- Single click in Inbox list (some column, like the star column) - one click to follow up, defaults today, second click to mark as done
- Button in preview / message window