I have had good results, I use a grunt tube and bleat can. None of them do anygood if there are no deer in the listening area. It's not going to bring a 150'' buck out to you from down the road, the sound is soft and does not carry far. Even the loudest I can blow on a grunt while still sounding like a deer is about 150yds on a calm calm day. Next like duck or turkey calling, if you don't know how to sound exactly like the game your calling you do more harm than good. example, you not going to call in a turkey by just scratching the stick on the slate, you have to know what language you are talking.