While the DVD has cardio in the title, it is actually a mix of high intensity moves and strength training. From jumping lunges with 5 lb weights, to mountain climbers to tricep kicks, it's got it all. As Bob says, he sends the heart rate on a roller coaster ride, from intensive burts to working recovery, your heart rate may go up and down but your body is always working.
If you're looking for a a good, strenuous workout DVD to buy, this is the one. It's one of my favorites, incorporates a lot of different moves and gives you one solid hour of exercise.
I couldn't find the video for free on youTube, unlike Jillian Michaels Bob Harper won't release his for free (Or no one will illegally post it for free?), but here's a preview if you're thinking of purchasing it.