I say GET THEM! I have them on loan and I'm LOVING them. This system has it all: steady state cardio, interval cardio, total body strength, cardio/strength/interval circuit, core, flexiblity. I've been using them since October 16 for the majority of my workouts but I'm not following the prescribed rotation. This is what I've done so far:
10/16 Pure Strength 1
10/17 Pure Cardio
10/18 No workout
10/19 No workout
10/20 Cardio Strength 2
10/21 Pure Cardio
10/22 Pure Strength 1
10/23 Athletic Step/RKS #9 Second half (swings)/RKS CD
10/24 Cardio Strength 2
10/25 Peak 10 Anytime Anywhere Workout
10/26 Peak 10 Dynamic Flexibility
10/27 Peak 10 Pure Stength 1
10/28 Turbo Fire Fire 30
10/29 Cardio Strength 2 (no extra rests or pauses)
My endurance is increasing b/c today I could do Cardio Strength 2 without having to take extra pauses to suck air in. I'm attempting and completing more push ups on my toes, I like the looks of my arms, my clothes are fitting nice and I've stayed one size down despite my diet pit falls. I love the use of the bands and the way these are put together is mint. The Pure Strength workouts fly b/c there is so little repetition over and over of the same move yet I feel completely worked out. Don't leave out the Anytime Anywhere Workout in your rotation. It is a great cardio/bodyweight workout and it packs quite a bunch in around 40 minutes.
If I could afford it, I'd own this set in a heart beat!