Depends on how one looks at it: I don't have the luxury of a private range, so ported on the bench will kill my neighbors at the other benches (see story again) and seems terribly inconsiderate.
Ported in the field makes me feel more confident about staying on target, though I've never had to take a second shot with that rifle and it's doubtful how much actual target acquisition difference it makes, anyway, with a .280.
