http://www.arrow-dynamic-solutions.com/VIDEO%20PAGE.htm
I read an article about them in a bowhunting mag. and the field test was good. THey shot them with a specific arrow your supposed to shoot Nitro Slingers with 5.5-inch parabolic feathers. I wouldn't want to swith arrows just to shoot them. The article said the flew perfect though. Those videos is what gets me going!