To me the biggest attraction of the rangefinder is the ability to easily hand-hold at much lower shutter speeds than with a slr.

There is also the "can see through the shot, no black-out" argument, but that is a bit moot in my opinion.

I've also had better image quality wide open from my r/f lenses than anything I have for slrs, but I know others don't accept that argument for various reasons.

As for the feathers: hey, pillow-fight!