The Classic Pilates System takes all the guesswork out of what you, the student, need to do next. The order of the exercises, from mat to reformer, build off one another so that when you do reach the more advanced, complicated exercise like boomerang , balance control off or snake & twist, you have prepared, lubricated, and opened up all the necessary muscles, joints, and ligaments that will make that exercise successful.
The caveat is: Classical Pilates is a lifelong endeavor! Rarely will someone nail the exercises on the first try, even if it appears to look good or the individual is strong and ripped. That is the beauty of Pilates as well. The work is constantly evolving and the only way to perfect anything is to continue to practice it.