Yes, most definately, I love them all!
The Intensity Series is my first and only Cathe workouts. These have a huge fun factor, and never boring. Cathe is very pleasant, joyful while working hard. The music is upbeat and motivating. The length of the workouts is perfect for me. Furthermore, these dvds are chaptered to the max so the possibilities with premixes and programming are endless.
I plan to do these workouts for a long time. I've owned this series on dvd for only two weeks, so it's too soon to comment on results.
I, like you, was aprehensive at first about purchasing these workouts. My reasons were because they are expensive, compared to some other workouts, and I had barely heard of Cathe prior to FitTV.
But I eventually took the plunge...and I am so glad I did. They are worth every penny!