I’m up to the Presto level and I also have more endurance and more range! The community band I play in just had our Christmas concert and I was able to get through it without my chops being totally worn out. Prior to starting this course I was struggling to get out a strong high E. Now, I am playing a double G! Though it’s not a usable double G yet, but I’m getting it to sound fairly well. I’m certain that as I progress in the levels that I will learn how to sound those double G’s with power!