I had one work for me.The Primos Roar. Called in a nice 8 point the 1st day I ever used it. Like any call it won't work every time. The situation has to be right. I'm sure another call might have had the same results. I love to call, whether it be turkey, deer or predators. It makes me feel like I have truely fooled the animal. That is just me. I also love gadgets and trying new things. Some work and some don't. It makes it fun for me!! I do feel like I called in both bucks that I killed this year. Both nice 8 points. Good luck. Keep us posted.