I have a primos Killer B. Killed some fired up toms over it, but scared off a lot of insubordinate toms as well. It seemed every now and then it'd work incredible, but the times it didn't it hurt my chances. I've had a DSD 1/4 strut the last 3 seasons and it's just deadly. The thing is bulky and heavy, but it gets toms and jakes up and in its face every time. I think DSD just got the size and posture of that decoy right, and that's where the difference is. Just enough to make everything see a challenge, but in a way that everything thinks they can get in its face and run him off.