I ran four 30 minute demos at Dragonmeet for Esoterrorists and played in Matt's 15 minute Covenant demo so I thought I'd post about my experience.

Esoterrorists has mechanics for plot, much more so than many Indie games and, as such, it's difficult to run a very short demo which is why I went for the 30 minute one. On reflection, I'm not sure I chose the best scenario for showcasing all that the system does because I think the focus may have been more on the adventure rather than the system. I'll have to think about this some more and would welcome any advice.

Matt ran his short demo which show very well how scenes work in Covenant. I asked loads of questions which Matt answered and I got a good idea of how play works in the immediate. I'm still not sure how this would transpose to longer term play but I'm not sure how that can be addressed in such a short demo.