We got the chance to do a Dramatic Task to rescue some miners from a collapse. It ended up feeling gamist and artificial to the players (similar to the D&D 4e Skill Challenge issue). I think that's because it's not well implemented into the rest of the structure of the game. When you are used to games like 5e - with basically no subsystems - it's difficult to take.If you were to try it again, I would recommend you advertise the subsystems - my absolute favorite part of the system (the Dramatic Task system in particular).
In the last session, I ended the final combat (which was dragging on for well over an hour) with a dramatic task for the final round.