I have been checking out Craft for the last several months. It is an excellent and rapidly improving app for note taking. In fact, I’d say their releases and improvements have come so fast that it is amazing. I’d also say that for composing notes, Craft is fantastic with its easy-to-use block structure.
The reason I mention it is that they just released a calendar integration. I am new to Agenda. I started testing Craft and Agenda at about the same time. After moving some notes from Agenda to Craft to test the new calendar integration, I can say that Craft is not yet nearly as well integrated with calendars nor nearly as capable as Agenda. At this moment, Agenda is far superior if you value date-centric notes.