How much change can I expect?

That all depends on you. Depending on how your voice sounds right now, the improvement may be instant and dynamic or gradual but lasting. If you truly listen to each and every part of the program, as well as perform the Warm-Up CD as often as possible, the improvement will happen faster and more noticeably. Roger has helped people who were so shy that they could barely whisper transform their voice into a confident and commanding symphony with rich tone and texture.