Once I got over my fear of clicking their links, which I assumed would open a new page (but instead just expanded a pane in-line), I really enjoyed it. I’m very wary of opening new pages. (Also, I first tried to hold-click on the link to open in new tab, but it just behaved like regular text and highlighted, which led to a momentary confusion. I would have preferred a more obvious indication of what would happen when clicking, like a down chevron or something.)