I have 3 Cody calls myself. I have the World Class glass, CodyII slate and the envy glass which I bought on clearance from walmart for $10.. The difference between the World Class and the envy is unbelievable! Night and day! I would agree I would not go in the woods without my Cody but I would not limit myself to just that call. I also had times the gobbler would not respond to the slate or world class but hammered back at a box or mouth call. What ever the turkey wants is what he is going to get!