Here is what I wrote over at VF:
I just finished Cardio Challenge. I did the modifier view. It is nice. You get a split screen so you always see the modifier but you also get to see the class in case you want to try what they are doing. I followed the modifier the entire time and I got a great high intensity, low impact workout. The entire 30 minutes is the warmup thru the workout. You have to wait a second after the class ends and the cool down screen comes up. You get a 2 minute cool down.
You do usually a series of 3-4 exercises linked together, then repeat the sequence I believe it was 3 times. You do get a 30 second water break between the sets. (that goes by quick lol) The modifier did a great job maintaining intensity while limiting the impact. For those that love all out intensity, you'll enjoy it.
I can only imagine doing this all out intensity every day would get you in shape. I didn't think you should go all out every day. The calendar has you doing one workout every day, Monday thru Friday. Saturday you have an option to take a rest or do his 20 minute stretch called Pulse. It sounded interesting, although I haven't previewed it. It is described as this: "Aka Shaun's version of a recovery workout, a low impact combo of stretching and small "pulsing" movements, so you will still feel the burn as your body rejuvenates for the week ahead." Sunday you rest.
Month one workouts:
Cardio Challenge: This is the one I did today. All cardio with some burpees etc.
Tabata Power: 20 seconds on, 10 second off format.
Sweat Intervals: This is like Cardio Challenge but states it is harder.
Tabata Strength: This doesn't come out until 1/2 way thru month 1. NO rest, tabata style workout.
Friday Fight, Round 1: "battle between your mind telling you to push to a new max and your body saying "OMG, are you serious"
Ab Attack: 10 10 minute ab routine
2nd month workouts include:
Max Out Cardio: described as crazy cardio with power moves
Max Out Power: Longer intervals, 45 seconds on, 15 seconds off tabata style plyometric madness
Max Out Sweat: appears to be another more straight forward cardio
Max Out Strength: 45 seconds on, 15 seconds off tabata routine, all upper body focused (arms, shoulders, chest and core)
Friday Fight, Round 2: the new "hardest workout ever" Every move is done for a minute
Hope this helps. I enjoyed following the modifier and got a great cardio workout. So far two thumbs up!