I live in Hawaii and my STS shock cardio wasn't supposed to arrive until Dec. 29, but I left for NYC so I am still waiting to do my workouts. I don't go home to Hawaii until Jan. 6 in the evening...but Thursday Jan. 7 I will be doing an STS workout for sure! I have been reading all of the reviews and watching all of the clips avidly. I think I will do one of the MMA workouts first. But they all look great!