Cardio and Weights is one of my all time favorites.
She has 4 cardio sections - I think they are 5 mins long - and inbetween each section is a weight section - for the weight section you do an exercise with light weights then the next exercise it's a heavier weight. You do chest and abs on the floor.
The cardio is step but very modifiable to low impact. The moves are interesting but easy to learn. In fact, the music is so good in this one that on occassion, when my knees really couldn't take any more step, I just pulled out the rebounder and freestyled on it.
If you get the DVD on it is also Imax2. Another favortie of mine.
Cardio & weights has pre-mixes - cardio only, and a couple of weights only pre-mixes.
The production and cueing is great. It's well worth getting. It's not an easy workout - definately high intermediate to advanced but it's modifiable to beginner so it's the type of workout you wouldn't outgrow too quickly.
I don't have any Kelly workouts.