What are the advantages/disadvantages to using either a kind of "Limited Narration" or an "Omniscient Narration" style when running a game?
i.e. Does saying...
None of the characters notice the Slave I floating amongst the trash. As you fly away, it silently powers up its engines and follows behind.
... in the style of an omniscient narrator make the role playing more difficult or the story more interesting? Or should the GM's description be limited to only what the player characters know and see, thus making them a limited narrator?