I like Spinnervals 6-- the Zoot Sportswear workout. I use a heart rate monitor and it keeps me at the edge of my max. They say intervals is the best way to train.
it is so interesting that on some exercises I can lift more that Cathe and on some far less. She is far ahead on curls-- especially on the Pyramid Upepr DVD.
I figured you were asking because Rosetta Stone seems to advertise on every one of Cathe's FitTV programs. That and EcoCanteen and VideoProfessor. I almost have the Rosetta Stone commercial memorized.