I can honestly say that these three words would best describe my experience with Virgil. I expected the challenge and it was definitely delivered through the various workouts that were designed.
Through each session and in between I found motivation through the Virgil's energetic drive and support. Virgil emphasizes the importance of your best effort. Without that, I can honestly say that my workouts now would still be the "hum drum" exercises that give me satisfaction of just working out--no extra effort involved.