Fat Burning Cardio is a wonderful video that gets your heart rate up, teaches you to do what is basically a standing crunch to lose inches in your waist and thighs. He focuses on strengthening your core as well as toning your abs in this video.
I love this series. I think they are great for a beginner who doesn't know where to start in working out. The moves get your heart rate pumping and from what I understand from others that are more advanced doing the videos, too, even if you do other types of workouts, this one will still get your heart pumping!
I love the Hip Hop Abs Series. Shaun T is very good about giving instructions before you do the exercises and starting with something basic and working up to complex moves. He has 3 levels of workouts so you can start off as a beginner and work your way up to doing complex moves that are alot of fun. He has a girl that does modified versions for less advanced people and also a girl who goes "all out" and gets way into it for those that really want to push themselves.