I did attend the duck calling class and felt that I more than got my money's worth. It was stressful to take my brand new RNT call apart and hope that after learning how to make new reeds, I would be able to replicate the factory sound. Good instruction and maybe some luck but I'm not re-installing the original; keeping it for a back-up. The calling instruction was well covered and we got a lot of practice during the session. Troy and Robert know how to put on a clinic that leads to success. I feel sorry for any duck that gets within hearing distance of their calls; dead duck!