Using a fly as a strike indicator is a great way of keeping the back cast nice and tout without causing the line to loop and open on you. This allows the fly to softly land on the water and not spook any fish. It will also save you from sore shoulders at the end of a long day drifting flies. Strike indicators are extremely light but can be bulky causing more of a strain during each cast from the wind resistance.
Two meetings down and it is easy to see why I missed them all summer long. Great group of guys, great learning environment, and a reason to talk fly fishing all winter long.