I love the music and the back routine in PH! Just about the time I want to give up the back routine comes up...maybe that's a lie, I usually want to give up in the middle of the squat routine! PH will take awhile to grow on me just because I have never been fond of endurance workouts. But to be honest, 5 PH workouts and I could see the difference already in my arms and legs. I dont believe you mentioned any difference in what endurance workouts do to the body ( you mentioned benefits as far as performance ) but after just 5 PHs my legs look leaner and I look skinnier. Although I think you are really mean during the squats and lunges ...that back routine makes up for it! Thanks for great workouts! Hope you make another PH !