This is a great, short workout with absolute perfect instruction & form from Karen Voight. I have her Burn & Firm, which is circuit training and love it as well. The cardio flows well, and it really gets the heart rate up. I am in good shape, and feel that this dvd can be beneficial to everyone - no matter the level. I love how she incorporates arms into the movements, making low-impact aerobics VERY effective. I do agree with one reviewer that she goes straight into the stretching RIGHT after you finish a heart pumping squat jump section, however, there is a quick break in the dvd that alerts you that the cool-down is about to begin...I pause it for about a minute while I march in place to cool down a bit, and then move on with the stretching... no big deal. Other reviewers have already offered a breakdown of the dvd, so I will just say that this is definitely worth the purchase ~ Karen is awesome, one of the best instructors around.