My experience has been 50/50 with the call. It's a great cover when stalking or walking to the stand.They write you off and think you're a pig till they see you standing upright.Then they jet. from the stand I have never seen it work. If they seem to be going away, you might want to give it a grunt or two to make them think another pig is eating close. If your lookin for a sour mash attractant, check out my page below.