I have this series and enjoy it a lot. Hitting a heavy bag makes a big difference; you have to keep your abs tight. There are five DVDs and they all have followed the same format. You do a series of pushes and kicks with different calisthenics (i.e. pushups, sit ups, jumping jacks) in between combinations. You do all one side, (i.e. start punches with right side) then you do your other side. There is a countdown clock between combinations. There is one 45 second rest between sides. It ends with a thorough stretch. There is very little chorography (think Cathe’s Heavy Bag Bonus Workout just longer 30-45min) which may be monotonous for some but I don’t mind this, I’m not the most coordinated person on the block. The background music has a consistent beat which makes it easy to keep the punching pace up. The production value isn’t the greatest, but it is easy to follow. My only complaint is that Merle’s voice reminds me of a Macaw.