I'm very intrigued by the Turning Point system at play in Deathwatch. But speaking as a GM, I'm torn between spelling out the Turning Points themselves, by explaining the time-limits, and how to defeat them, as opposed to simply just introducing them via character exposition or whatever.
What do you guys think? Would you prefer that your GM provide you with the Turning Point explanation, how to defeat it, and how long you've got? Or would you rather they simply point out the event, possibly by even introducing a Turning Point queue, and simply letting the players try and overcome it themselves?