I think this may be one of the best calls in years. However I think it's only effective for a short time in the pre rut. I watched a nice 8 point doing the "roar" many times for nearly 2 hours the other day.6 more bucks came in to him as he was doing it. He was guarding a doe and was very very charged up. Every time he would roar he would charge at her. Bucks doing this are ready to explode and are ready to breed a doe and other bucks know this and want to come get in on the action. Also the new roar call does a great job of imitating this sound. It may not bring in every monster buck in the woods but its worth having just in case.