I spent the last 12 months testing Agenda, Craft, and Bear. I exclusively used each for four months. Each of these three has some amazing strengths. They are all really excellent in many ways.
Not only is Agenda fantastic, but it is the best calendar-centric note taking app of the group by far. Agenda is outstanding, even irrespective of date-focus. It has so many features that the others lack. Plus it has a wonderful visual appeal.
The one thing I find odd about Agenda is the actual agenda view. The lack of customizability, flexibility, and thumbnail views really seems odd, especially since Agenda is the name of the app. I mention this because I think it is an important feature. It is the only thing that holds Agenda back, in my view.
Just an observation by an Agenda enthusiast.