I love these ones. I've incorporated them into my Insanity rotation so I've been doing them lately. They are both short (one is 45 minutes and the other is 53 minutes or something like that) but effective. She hits some muscle groups in these that don't get used much in some of her other workouts. Compared to other workouts where Cathe tells you what weight she is using, I find that the weights Cathe suggests are light, so I need to go heavier than she does, but as long as I do that I feel I get a good workout.
Stebby