John,
Agreed; it's one of the most effective flies I've ever used and the trailing fibers really seem to draw the fish's attention. That's how I tie it in the standard form, wrapping the single feather and leaving it in it's natural state. When using multiple feathers in a dubbing loop, however, the fly takes on the appearance of a milkweed seed on steroids and mine often land on their sides or inverted; by trimming out the bottom a little bit, they usually land on the water in the proper orientation and still have plenty of trailing fibers to do their magic.
Regards,
Scott