[ericthered]

I had a PC in my banestormed romans game who took it. The PC was the defacto administrator of the town when it happened, and time could move rather quickly in that game. He had an NPC Ally specifically to fill in for his down time. He did not reveal this fact to the other PC's at first, and at the start of every session or big movement in time we'd roll to see what state the character was in. The other PC's thought he had some sort of sleep problem.

It was a very memorable trait that had an impact on the game without derailing it. Once the other players knew about the condition, it was fun to say "Is he available?" when an issue came up. In a game with different pacing the disadvantage could conceivably be much more crippling.