Since the poll only gives me one choice I didn't vote. I use blazers with my Diamond and feathers with my Darton recurve. The reasons are for optimum performance with the bow I'm using at the time.
I hate nit pickin, but i will anyway Blazers are vanes, just a different style. I shoot them because they are tough as nails, they dont rip at all and retain their shape nicely. They also are stiff, less flutter, therefore less noise. They are lighter than most vanes, so that increases speed a little. They work! They stabilize broadheads great. Blazers are a great product.