The are huge, but the ones I know of were used ALOT. My two buddies ordered a couple before season started this spring, and they hunted with them almost every time they went. They did have a couple subordinate birds shy away from it, but for the most part they killed all their birds floggin the DSD. I won't ever be carrying one around because I rarely use the decoys I have stuffed in my vest, much less one as big as I am. But, from video evidence, they flat kill some turkeys.