The ability to export and "increased" storage for paid accounts, but neither are expounded on. How is the data exported? How much storage does each tier get?

Also, how would this play with a custom domain (if it's possible)? What about security; is anything encrypted or secured at all?

This looks really nice, and the editor is a pleasant change from the usual early-00's look of some PM software. But for services that I plan to put business assets in (like all of the company's shared knowledge) I need more information before taking the leap.