I have shot them at 20 yards and seem to fly with my field points. What I didn't care for was the noise during the shot. There was a loud rattle just as the bow went off. I am not sure if is due to how the broadhead was made. With the blades sweeping out a little from the force of the arrow leaving the bow, that could be the reason for the noise, but not real sure.
Nap also makes so other great fixed heads like the hellrazor and the nightmare. They are great flying and are very shrap.
I hope this helped you some!